Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Deficit) - Additional Information (Detail)

v3.7.0.1
Stockholders' Equity (Deficit) - Additional Information (Detail)
 3 Months Ended
Apr. 20, 2017
Jan. 04, 2017
USD ($)
shares
Mar. 31, 2017
USD ($)
$ / shares
shares
May 31, 2017
shares
Apr. 30, 2017
$ / shares
shares
Dec. 31, 2016
$ / shares
shares
Class of Stock [Line Items]            
Common stock, shares authorized     38,500,000     38,500,000
Common stock, par value | $ / shares     $ 0.001     $ 0.001
Share based lump sum payment | $   $ 350,000        
Repurchase of common stock   7,500        
Payment of buyback of common stock | $   $ 56,000 $ 56,000      
2014 Stock Option/Stock Issuance Plan [Member]            
Class of Stock [Line Items]            
Common stock reserved for future issuance     3,426,822      
Options Granted     0      
Unrecognized compensation expense related to stock options | $     $ 521,000      
Note Purchase Agreement [Member]            
Class of Stock [Line Items]            
Common stock, shares issued     120,000      
Line of credit maximum borrowing capacity | $     $ 45,000,000      
Initial installment under line of credit | $     $ 2,000,000      
Subsequent Event [Member]            
Class of Stock [Line Items]            
Reverse stock split ratio 0.6          
Stockholders' equity, reverse stock split 0.6-for-1.0          
Common stock, shares authorized       75,000,000 38,500,000  
Common stock, par value | $ / shares         $ 0.001  
Restricted Stock [Member] | 2014 Stock Option/Stock Issuance Plan [Member]            
Class of Stock [Line Items]            
Stock issued during period, shares, share-based compensation     1,500      
Vesting period     4 years      
Unrecognized cost of share-based compensation awards | $     $ 816,000      
Cost of share-based compensation awards, recognition period     3 years 1 month 6 days      
Stock Options [Member] | 2014 Stock Option/Stock Issuance Plan [Member]            
Class of Stock [Line Items]            
Vesting period     4 years      
Cost of share-based compensation awards, recognition period     3 years 3 months 19 days      
Expiration period     10 years