Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Additional Information (Detail)

v3.4.0.3
Summary of Significant Accounting Policies - Additional Information (Detail)
1 Months Ended 3 Months Ended
May. 06, 2016
USD ($)
Mar. 11, 2016
Aug. 31, 2014
USD ($)
Mar. 31, 2016
USD ($)
Segment
shares
Mar. 31, 2015
USD ($)
shares
Apr. 30, 2016
USD ($)
Dec. 31, 2015
USD ($)
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       $ 1,290,000 $ 1,635,000   $ 219,000   $ 6,033,000
Working capital excluding cash and cash equivalent       24,900,000     $ 25,900,000    
Net cash generated (used) in operating activities       93,000 (7,200,000)        
Debt instrument agreement period     3 years            
Line of credit facility, maximum borrowing amount     $ 25,000,000         $ 25,000,000  
Guaranteed borrowing capacity               $ 5,000,000  
Revenue from sales taxes       $ 900,000 $ 700,000        
Maturity of temporary cash investments       3 months          
Business acquisition, number of shares issued | shares       279,634 803,582        
Subsequent Event                  
Summary Of Significant Accounting Policies [Line Items]                  
Line of credit facility, maximum borrowing amount           $ 27,000,000      
Revolving Credit Facility $ 17,000,000                
Revolving Credit Facility, additional borrowing capacity $ 9,800,000                
Line of credit facility sub limit additional borrowing capacity           2,000,000      
Guaranteed additional borrowing capacity           $ 7,000,000      
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       $ 6,500,000 $ 6,500,000