Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Detail)

v3.6.0.2
Income Taxes - Additional Information (Detail) - USD ($)
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Operating Loss Carryforwards [Line Items]    
Research and development credits $ 600,000  
U.S. Federal NOL carryforwards relating to deductions taken with respect to stock option exercises 600,000  
Uncertain tax positions $ 0  
Operating loss carryforwards, limitations on use The Company is subject to an annual limitation of $1.8 million on its use of remaining pre-ownership change net operating loss carryforwards of $4.7 million (and certain other pre-change tax attributes).  
Annual limitation on use of net operating loss carryforwards $ 1,800,000  
Remaining pre-ownership change net operating loss carryforwards 4,700,000  
Deferred Federal Tax [Member]    
Operating Loss Carryforwards [Line Items]    
Federal and state operating loss carryforwards $ 24,100,000 $ 15,500,000
Federal and state net operating losses expiry time period Dec. 31, 2028  
Deferred State and Local Tax [Member]    
Operating Loss Carryforwards [Line Items]    
Federal and state operating loss carryforwards $ 800,000  
Federal and state net operating losses expiry time period Dec. 31, 2017  
Net operating loss substantial portion expiration period 2017  
Minimum [Member]    
Operating Loss Carryforwards [Line Items]    
Operating loss carryforwards expiration period 5 years  
Maximum [Member]    
Operating Loss Carryforwards [Line Items]    
Operating loss carryforwards expiration period 20 years