Summary of Significant Accounting Policies - Additional Information (Detail) |
3 Months Ended | 12 Months Ended | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Oct. 01, 2015
Reporting_unit
|
Dec. 01, 2014
shares
|
Dec. 31, 2015
USD ($)
|
Sep. 30, 2015
USD ($)
|
Jun. 30, 2015
USD ($)
|
Mar. 31, 2015
USD ($)
|
Dec. 31, 2014
USD ($)
|
Sep. 30, 2014
USD ($)
|
Jun. 30, 2014
USD ($)
|
Mar. 31, 2014
USD ($)
|
Dec. 31, 2015
USD ($)
Segment
shares
|
Dec. 31, 2014
USD ($)
Segment
shares
|
Dec. 31, 2013
USD ($)
shares
|
Oct. 31, 2015
USD ($)
|
Apr. 30, 2015
USD ($)
|
Aug. 31, 2014
USD ($)
|
|
| Summary Of Significant Accounting Policies [Line Items] | ||||||||||||||||
| Number of reportable segments | Segment | 1 | 2 | ||||||||||||||
| Working capital excluding cash and cash equivalent | $ 25,900,000 | $ 18,800,000 | $ 25,900,000 | $ 18,800,000 | ||||||||||||
| Convertible stock, Conversion of preferred stock | shares | 36,300,171 | |||||||||||||||
| Line of credit facility, maximum borrowing amount | $ 30,000,000 | $ 25,000,000 | $ 25,000,000 | |||||||||||||
| Borrowing capacity | 22,000,000 | 22,000,000 | ||||||||||||||
| Guaranteed borrowing capacity | $ 5,000,000 | |||||||||||||||
| Bank loan payable | 2,600,000 | 2,600,000 | ||||||||||||||
| Revenues realized | 44,348,000 | $ 37,733,000 | $ 27,245,000 | $ 20,330,000 | 27,494,000 | $ 26,877,000 | $ 17,517,000 | $ 4,952,000 | $ 129,656,000 | 76,840,000 | $ 26,060,000 | |||||
| Unbilled contract receivable expected billing period | 12 months | |||||||||||||||
| Revenue from sales taxes | $ 4,500,000 | 2,700,000 | 500,000 | |||||||||||||
| Maturity of temporary cash investments | 3 months | |||||||||||||||
| Number of reporting units tested for impairment of goodwill | Reporting_unit | 1 | |||||||||||||||
| Advertisement Expenses | $ 300,000 | $ 300,000 | $ 300,000 | |||||||||||||
| Net deferred tax liabilities | 6,600,000 | $ 6,600,000 | ||||||||||||||
| Share based compensation, number of options granted | shares | 0 | 0 | ||||||||||||||
| Business acquisition, number of shares to be issued | shares | 2,929,669 | 8,035,826 | ||||||||||||||
| Deemed distribution on exchange of preferred stock | $ 5,301,000 | |||||||||||||||
| Minimum | ||||||||||||||||
| Summary Of Significant Accounting Policies [Line Items] | ||||||||||||||||
| Product warranty | 1 year | |||||||||||||||
| Maximum | ||||||||||||||||
| Summary Of Significant Accounting Policies [Line Items] | ||||||||||||||||
| Product warranty | 10 years | |||||||||||||||
| Contingent payment of stock issued for acquisitions of businesses | $ 6,500,000 | $ 11,700,000 | $ 6,500,000 | $ 11,700,000 | ||||||||||||