Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Additional Information (Details)

v3.19.3
Stock-Based Compensation - Additional Information (Details)
3 Months Ended 9 Months Ended
Jul. 23, 2019
shares
$ / shares
Sep. 30, 2019
USD ($)
shares
Sep. 30, 2018
USD ($)
Sep. 30, 2019
USD ($)
stock_plan
$ / shares
shares
Sep. 30, 2018
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       20,000  
exercise price (usd per share) | $ / shares       $ 5.89  
Share-based Payment Arrangement, Expense | $   $ 40,000 $ 134,000 $ 226,000 $ 403,000
Discontinuing Operations          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based Payment Arrangement, Expense | $   $ 17,000 $ 55,000 $ 91,000 $ 328,000
2011 Equity Incentive Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares available for future awards (in shares) | shares   28,524   28,524  
Stock Options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Dividend yield (percent)   0.00% 0.00% 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  
Nonemployee | Stock Options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock options issued (in shares) | shares 3,333        
Number of non-employee directors | shares 5        
Vesting period 12 months        
exercise price (usd per share) | $ / shares $ 4.50        
Employee          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Unrecognized compensation cost related to non-vested stock options granted | $   $ 214,000   $ 214,000  
Unrecognized compensation cost related to non-vested stock options granted expect to recognize, period (in years)       2 years 3 months 7 days