CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) (USD $)	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Cash flows from operating activities:
Net loss	$ (74,394)	$ (1,380,633)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	46,246	40,530
Stock-based compensation expense	511,716	471,646
Changes in operating assets and liabilities:
Accounts receivable	1,126,358	(364,789)
Inventories	(405,722)	(62,563)
Prepaid expenses and other current assets	118,747	(60,603)
Deferred costs	(529,366)	668,458
Other assets	(36,629)	(83)
Accounts payable	787,047	200,033
Accrued expenses and other current liabilities	(490,727)	(1,147,120)
Deferred revenue	(2,569,332)	(72,182)
Net cash used in operating activities	(1,516,056)	(1,707,306)
Cash flows from investing activities:
Purchases of equipment, molds, furniture and fixtures	(205,345)	(97,910)
Additions to patent rights	(21,711)	(46,554)
Proceeds from maturities of investment securities	3,000,000	0
Purchases of investment securities	(3,008,366)	0
Net cash used in investing activities	(235,422)	(144,464)
Cash flows from financing activities:
Proceeds from exercise of stock options and warrants	582,940	5,079,851
Taxes paid related to net share settlement of equity awards	(28,916)	0
Net cash provided by financing activities	554,024	5,079,851
Effect of exchange rate changes on cash and cash equivalents	7,107	(9,521)
Net increase (decrease) in cash and cash equivalents	(1,190,347)	3,218,560
Cash and cash equivalents:
Beginning of period	19,357,932	9,847,813
End of period	$ 18,167,585	$ 13,066,373