Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Schedule of Adoption of ASU Impacted on Previously Reported Unaudited Quarterly Results (Details)

v3.6.0.2
Summary of Significant Accounting Policies - Schedule of Adoption of ASU Impacted on Previously Reported Unaudited Quarterly Results (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Jun. 30, 2016
Sep. 30, 2016
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]                            
Deferred tax asset - noncurrent $ 26,654 $ 26,037 $ 26,236 $ 26,856 $ 15,464       $ 26,236 $ 26,037 $ 26,654 $ 15,464    
Total assets 214,049 211,314 197,518 180,782 161,314       197,518 211,314 214,049 161,314    
Accumulated deficit (12,363) (17,623) (22,869) (30,361) (45,108)       (22,869) (17,623) (12,363) (45,108)    
Total stockholders' equity 182,088 172,605 162,235 150,571 134,018       162,235 172,605 182,088 134,018 $ 118,150 $ (62,372)
Provision for income taxes 574 203 550 879 (541) $ 982 $ 1,855 $ 846 1,429 1,632 2,206 3,142 3,226  
Net income $ 5,260 $ 5,246 $ 7,492 $ 2,521 $ 3,858 $ 2,696 $ 3,459 $ 1,572 $ 10,013 $ 15,259 $ 20,519 $ 11,585 $ 6,826  
Weighted-average common shares - basic common stock 20,310,857 20,157,688 19,972,395 19,827,669 19,689,662 19,428,653 19,310,064 19,167,585 19,900,032 19,986,544 20,067,152 19,398,991 16,182,569  
Weighted-average common shares - diluted common stock 21,362,513 21,182,587 20,997,429 20,840,367 20,812,773 20,783,550 20,672,414 20,562,040 20,931,802 21,000,945 21,095,867 20,708,170 18,037,498  
Net income per share - basic common stock $ 0.26 $ 0.26 $ 0.38 $ 0.13 $ 0.20 $ 0.14 $ 0.18 $ 0.08 $ 0.50 $ 0.76 $ 1.02 $ 0.60 $ 0.33  
Net income per share - diluted common stock $ 0.25 $ 0.25 $ 0.36 $ 0.12 $ 0.19 $ 0.13 $ 0.17 $ 0.08 $ 0.48 $ 0.73 $ 0.97 $ 0.56 $ 0.30  
As reported                            
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]                            
Deferred tax asset - noncurrent   $ 9,514 $ 11,504 $ 14,474         $ 11,504 $ 9,514        
Total assets   194,791 182,786 168,400         182,786 194,791        
Accumulated deficit   (34,146) (37,601) (42,743)         (37,601) (34,146)        
Total stockholders' equity   156,082 147,503 138,189         147,503 156,082        
Provision for income taxes   1,994 2,900 1,035         3,935 5,929        
Net income   $ 3,455 $ 5,142 $ 2,365         $ 7,507 $ 10,962        
Weighted-average common shares - basic common stock   20,157,688 19,972,395 19,827,669         19,900,032 19,986,544        
Weighted-average common shares - diluted common stock   21,100,725 20,925,613 20,783,943         20,860,878 20,924,022        
Net income per share - basic common stock   $ 0.17 $ 0.26 $ 0.12         $ 0.38 $ 0.55        
Net income per share - diluted common stock   $ 0.16 $ 0.25 $ 0.11         $ 0.36 $ 0.52