Quarterly report pursuant to sections 13 or 15(d)

Summary of Significant Accounting Policies - Additional Information (Detail)

Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	3 Months Ended					9 Months Ended		12 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Sep. 30, 2012	Jun. 30, 2012	Sep. 30, 2013 Segment	Sep. 30, 2012	Dec. 31, 2012	Dec. 31, 2011
Summary Of Significant Accounting Policies [Line Items]
Cash and cash equivalents	$ 5,762,765			$ 4,297,721		$ 5,762,765	$ 4,297,721	$ 4,434,292	$ 3,014,656
Cash flow from operations	(44,607)	(160,432)	(5,009,158)	(1,082,413)	(798,059)	(5,214,197)	(2,937,170)
Cash proceeds from issuance of common stock	5,000,000	5,000,000	5,000,000			4,947,791	5,195,225
Working capital excluding cash and cash equivalent	48,000					48,000		(6,249,000)
Working capital improvement	6,297,000					6,297,000
Revenues realized	5,313,486			1,250,515		18,982,195	3,452,067
Accrued liability for inventory returns			789,057
Revenue from sales taxes						544,000
Maturity of temporary cash investments						3 months
Provision for income taxes	0			0		0	0
Anti-dilutive shares						23,022,413	48,870,542
Stock options granted						0		54,250
Stock-based compensation expenses	52,627					753,512	44,313
Number of reportable segments						2
Revenue
Summary Of Significant Accounting Policies [Line Items]
Percentage of risk concentration						47.00%
Trade Accounts Receivable
Summary Of Significant Accounting Policies [Line Items]
Percentage of risk concentration						0.00%
Level 1
Summary Of Significant Accounting Policies [Line Items]
Cash equivalents at fair value	107,000					107,000		3,693,000
Employees
Summary Of Significant Accounting Policies [Line Items]
Stock-based compensation expenses	79,552			227		169,782	44,313
Non Employees
Summary Of Significant Accounting Policies [Line Items]
Stock-based compensation expenses	(26,924)			0		583,730	0
Issuance of Equity
Summary Of Significant Accounting Policies [Line Items]
Cash proceeds from issuance of convertible preferred stock	$ 10,000,000	$ 10,000,000	$ 10,000,000
Minimum
Summary Of Significant Accounting Policies [Line Items]
Unamortized licensing fees Period						3 years
Product warranty						1 year
Maximum
Summary Of Significant Accounting Policies [Line Items]
Unamortized licensing fees Period						10 years
Product warranty						7 years