Annual report pursuant to Section 13 and 15(d)

Related Party Transactions (Detail)

v3.8.0.1
Related Party Transactions (Detail)
3 Months Ended 12 Months Ended
Dec. 08, 2017
shares
Oct. 03, 2017
shares
Aug. 09, 2017
shares
May 22, 2017
shares
Mar. 30, 2017
shares
Mar. 28, 2017
shares
Mar. 27, 2017
shares
Mar. 24, 2017
shares
Oct. 24, 2016
shares
Sep. 14, 2016
shares
May 25, 2016
shares
Apr. 01, 2014
USD ($)
Mar. 31, 2014
extension
shares
Dec. 31, 2017
USD ($)
$ / shares
shares
Dec. 31, 2016
USD ($)
$ / shares
shares
Oct. 31, 2013
shares
Related Party Transaction [Line Items]                                
Number of revolving line of credit extensions facility (extension) | extension                         8      
Common stock exercised (shares)     25,000 9,000 123,700 64,200 214,300 375,700           902,000    
Convertible shares issued to common stock (shares)                           27,754,000 18,936,000 10,000
Employee stock option purchased (shares)                           902,000 417,000  
Issuance of common stock (shares) 3,500,000 2,000             50,000 2,750,000 2,467,820          
Warrants to purchase common stock, issued (shares)                   137,500            
Financial Guarantee                                
Related Party Transaction [Line Items]                                
Common stock purchased (shares)                         284,000      
Common stock exercised (shares)                           440,113    
Private Placement                                
Related Party Transaction [Line Items]                                
Warrants to purchase common stock, issued (shares)                     1,233,910          
John Pappajohn                                
Related Party Transaction [Line Items]                                
Common stock purchased (shares)                           202,630    
Warrants adjusted in conjunction with IPO (shares)                           275,556    
Warrants outstanding per share (usd per share) | $ / shares                           $ 15.00    
Additional amount of loan received | $                           $ 6,750,000    
John Pappajohn | Financial Guarantee                                
Related Party Transaction [Line Items]                                
Common stock purchased (shares)                         1,051,506      
John Pappajohn | IPO                                
Related Party Transaction [Line Items]                                
Convertible shares issued to common stock (shares)                           675,000    
Conversion price of notes (usd per share) | $ / shares                           $ 10.00    
Equity Dynamics, Inc.                                
Related Party Transaction [Line Items]                                
Related party consulting fees | $                       $ 10,000        
Agreement with related party, consulting fee | $                           $ 120,000 $ 120,000  
Due to related party | $                           10,000 50,000  
Dr. Chaganti                                
Related Party Transaction [Line Items]                                
Agreement with related party, fee | $                             5,000  
Agreement with related party, consulting fee | $                             $ 60,000  
Dr. Chaganti | 2011 Equity Plan                                
Related Party Transaction [Line Items]                                
Employee stock option purchased (shares)                             200,000  
Common stock, vesting period                             4 years  
Common stock, shares purchased price per share (usd per share) | $ / shares                             $ 15.89  
Renewed Consulting and Advisory Agreement | Dr. Chaganti                                
Related Party Transaction [Line Items]                                
Consulting and advisory agreement expenses under stock option plan | $                           $ 69,250 $ 37,625  
USPTO Patent Issuance Agreement | Dr. Chaganti                                
Related Party Transaction [Line Items]                                
Agreement with related party, one-time payment required | $                             $ 50,000  
Agreement with related party, percentage of net revenues required to be paid                             1.00%  
Board of Directors Chairman | Private Placement                                
Related Party Transaction [Line Items]                                
Issuance of common stock (shares)                     317,820          
Warrants to purchase common stock, issued (shares)                     158,910