Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation - Additional Information (Detail)

Basis of Presentation - Additional Information (Detail) (USD $)
9 Months Ended 0 Months Ended
Sep. 30, 2013
Sep. 19, 2013
Jul. 26, 2013
Dec. 31, 2012
Sep. 30, 2012
Dec. 31, 2011
Nov. 08, 2013
Subsequent Event
Basis Of Presentation [Line Items]              
Number of operating segment 1            
Working capital $ 5,000,000            
Cash and cash equivalents 4,151,000     2,543,000 1,295,000 3,307,000  
Net accounts receivable 10,802,000     11,680,000      
Lines of credit remaining borrowing capacity 2,500,000            
Number revolving credit facility agreements 2            
Period of financial resources Management expects that the working capital and future borrowings available under the lines of credit should be sufficient to fund the minimum requirements of the Company; however, the Company cannot guarantee that it will be able to increase sales, reduce expenses, or obtain additional funds when needed or that such funds, if available, will be obtainable on terms satisfactory to the Company. Management will continue to monitor the liquidity of the Company and is prepared to implement cash saving measures or potentially issue debt or equity securities in the event that its plans to grow revenue do not materialize in the timeline anticipated by management.            
Maximum stock offering price     30,000,000        
Amended maximum stock offering price   5,000,000          
Placement agent fees, as a percentage of gross proceeds 5.00%            
Common stock shares issued 2,688,172            
Common stock issued, price per share $ 1.86            
Proceeds from equity offering, gross 5,000,000            
Proceeds from equity offering, net of expenses 4,592,000            
Payments of stock issuance costs 408,000            
Minimum equity raise requirement by March 1, 2014 covenant             $ 3,000,000