Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Additional Information (Detail)

v3.5.0.2
Summary of Significant Accounting Policies - Additional Information (Detail)
1 Months Ended 3 Months Ended 6 Months Ended
Mar. 11, 2016
May 31, 2016
USD ($)
Jun. 30, 2016
USD ($)
shares
Jun. 30, 2015
USD ($)
shares
Jun. 30, 2016
USD ($)
Segment
shares
Jun. 30, 2015
USD ($)
shares
Dec. 31, 2015
USD ($)
Apr. 30, 2015
USD ($)
Dec. 31, 2014
USD ($)
Summary Of Significant Accounting Policies [Line Items]                  
Number of reportable segments | Segment         1        
Reverse stock split 0.1                
Cash and cash equivalents     $ 5,190,000 $ 483,000 $ 5,190,000 $ 483,000 $ 219,000   $ 6,033,000
Working capital     35,900,000   35,900,000   25,900,000    
Net cash generated (used) in operating activities         (930,000) (13,917,000)      
Issuance of common stock, net of issuance fees   $ 15,200,000 15,200,000   16,191,000        
Issuance of common stock in a private placement     1,000,000   1,000,000        
Line of credit facility, maximum borrowing amount     27,000,000   $ 27,000,000        
Line of credit facility, maturity date         2017-08        
Guaranteed borrowing capacity     7,000,000   $ 7,000,000     $ 5,000,000  
Guaranteed additional borrowing capacity     7,000,000   7,000,000        
Revolving credit facility     22,576,000   22,576,000   $ 22,026,000    
Revolving Credit Facility, additional borrowing capacity     4,400,000   4,400,000        
Total liquidity     $ 9,600,000   9,600,000        
Revenue from sales taxes         $ 2,200,000 $ 1,800,000      
Maturity of temporary cash investments         3 months        
Potentially dilutive shares included in the computation of basic and diluted earnings per share | shares     80,001 505,933 80,001 505,933      
Minimum                  
Summary Of Significant Accounting Policies [Line Items]                  
Product warranty         1 year        
Intangible assets, estimated useful life         1 year        
Maximum                  
Summary Of Significant Accounting Policies [Line Items]                  
Product warranty         10 years        
Intangible assets, estimated useful life         17 years 6 months        
Contingent payment of stock issued for acquisitions of businesses     $ 2,500,000 $ 6,500,000 $ 2,500,000 $ 6,500,000      
Contractual accrued obligations on certain channel distribution agreement     $ 1,500,000   $ 1,500,000