Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Additional Information (Details)

v3.20.2
Stock-Based Compensation - Additional Information (Details)
$ / shares in Units, shares in Thousands
3 Months Ended 6 Months Ended
Jan. 02, 2020
$ / shares
shares
Jun. 30, 2020
USD ($)
shares
Jun. 30, 2019
USD ($)
Jun. 30, 2020
USD ($)
stock_plan
$ / shares
shares
Jun. 30, 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     20  
exercise price (usd per share) | $ / shares $ 5.53     $ 5.53  
Stock-based compensation (benefit)   $ 55,000 $ 67,000 $ 113,000 $ 186,000
Discontinuing Operations          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock-based compensation (benefit)   $ (8,000) $ 35,000 $ (8,000) $ 74,000
2011 Equity Incentive Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares available for future awards (in shares) | shares   25   25  
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   $ 0  
Employee          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Unrecognized compensation cost related to non-vested stock options granted   $ 148,000   $ 148,000  
Unrecognized compensation cost related to non-vested stock options granted expect to recognize, period (in years)       1 year 9 months 14 days