XML 59 R47.htm IDEA: XBRL DOCUMENT v3.19.1
Stock-Based Compensation - Summary of Option and RSU Activity (Details) - $ / shares
 1 Months Ended 12 Months Ended
Jan. 01, 2018
Aug. 23, 2016
Dec. 31, 2018
Dec. 31, 2017
Jun. 30, 2014
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Shares Available for Grant                
Options granted (in shares)   (334,027)            
Number of Shares                
Options granted (in shares)   334,027            
Options cancelled and expired (in shares)   (456,995)            
Equity Incentive Plan 2010                
Shares Available for Grant                
Balance at the beginning of the year (in shares) 231,000         231,000 114,000 106,000
Additional shares authorized 50,000              
RSUs cancelled and returned to Plan (in shares)               8,000
Options granted (in shares)           (40,000) (160,000) (384,000)
Options cancelled and returned to Plan (in shares)           10,000 375,000 479,000
Balance at the end of the period (in shares)     4,007,000 231,000   4,007,000 231,000 114,000
Number of Shares                
Balance at the beginning of the year (in shares) 307,000         307,000 522,000 675,000
Additional shares authorized 50,000              
RSUs cancelled and returned to Plan (in shares)               (8,000)
Options granted (in shares)           40,000 160,000 384,000
Options cancelled and returned to Plan (in shares)           10,000 375,000 479,000
Options cancelled and expired (in shares)               (58,000)
Balance at the end of the period (in shares)     337,000 307,000   337,000 307,000 522,000
Weighted Average Exercise Prices                
Weighted-average exercise price (in dollars per share) $ 4.81         $ 4.81 $ 13.88 $ 35.10
Options granted (in dollars per share)           1.28 0.76 6.96
Options cancelled and returned to Plan (in dollars per share)           11.63 15.69 35.64
Options cancelled and expired (in dollars per share)               44.80
Weighted-average exercise price (in dollars per share)     $ 4.19 $ 4.81   $ 4.19 $ 4.81 $ 13.88
Options | Equity Incentive Plan 2010                
Shares Available for Grant                
Additional shares authorized     4,000,000 200,000 150,000 4,050,000 250,000 50,000
Number of Shares                
Additional shares authorized     4,000,000 200,000 150,000 4,050,000 250,000 50,000
RSU's | Equity Incentive Plan 2010                
Shares Available for Grant                
RSUs granted (in shares)           (268,000) (407,000) (144,000)
RSUs cancelled and returned to Plan (in shares)           24,000 59,000 7,000
Number of Shares                
RSUs cancelled and returned to Plan (in shares)           (24,000) (59,000) (7,000)
Weighted Average Exercise Prices                
RSUs granted (in dollars per share)           $ 0.89 $ 0.93 $ 5.30
RSUs cancelled and returned to Plan (in dollars per shares)           $ 1.21 $ 5.04 $ 15.67