Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Additional Information (Details)

v3.20.1
Stock-Based Compensation - Additional Information (Details)
$ / shares in Units, shares in Thousands
3 Months Ended
Jan. 02, 2020
$ / shares
shares
Mar. 31, 2020
USD ($)
stock_plan
shares
Mar. 31, 2019
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of equity incentive plans | stock_plan   2  
Options granted maximum exercisable period (up to)   10 years  
Stock options issued (in shares) | shares 20    
exercise price (usd per share) | $ / shares $ 5.53    
Stock-based compensation (benefit)   $ 58,000 $ 119,000
Discontinuing Operations      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation (benefit)   $ 0 $ 39,000
2011 Equity Incentive Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares available for future awards (in shares) | shares   24  
Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 12 months    
Dividend yield   0.00% 0.00%
Restricted Shares of Common Stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized compensation cost   $ 0  
Employee      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized compensation cost related to non-vested stock options granted   $ 207,000  
Unrecognized compensation cost related to non-vested stock options granted expect to recognize, period (in years)   1 year 8 months 19 days