CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $)	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Cash flows from operating activities:
Net loss	$ (9,069,994)	$ (11,855,303)
Adjustments to reconcile net loss to net cash from operating activities:
Depreciation and amortization	1,702,187	2,224,070
Share-based payment compensation	2,508,448	2,529,229
Non-cash professional services expenses	29,930	126,071
Realized loss (gain) on marketable securities	(546)	0
Impairment of cost method investments	0	0
Excess tax benefits from stock-based award activity	0	0
Provision for returns and doubtful accounts	(325,591)	(317,809)
Deferred income tax provision	7,928	14,912
Changes in operating assets and liabilities:
Accounts receivable	9,248,544	6,060,390
Prepaid expenses and other current assets	43,214	(263,610)
Inventory	668,363	190,831
Other assets	(20,718)	11,854
Accounts payable	(222,903)	936,232
Accrued expenses and other liabilities	(6,202,916)	431,453
Deferred revenue	(837,581)	2,248,781
Net cash provided by (used in) operating activities	(2,471,635)	2,337,101
Cash flows from investing activities:
Sales of marketable securities	11,818,443	10,284,132
Purchases of marketable securities	(7,341,816)	(12,231,093)
Purchases of property and equipment	(1,612,104)	(1,289,194)
Purchase of software licenses	0	0
Capitalized software development costs	(461,555)	(700,084)
Security deposits	(41,746)	(8,522)
Purchase of intangible assets	(44,610)	(35,220)
Net cash used in investing activities	2,316,612	(3,979,981)
Cash flows from financing activities:
Proceeds from exercise of stock options	624,155	552,774
Payments to acquire treasury stock	0	0
Excess tax benefits from stock-based award activity	0	0
Net cash provided by financing activities	624,155	552,774
Effect of exchange rate changes on cash and cash equivalents	(242,694)	(135,803)
Net increase (decrease) in cash and cash equivalents	226,438	(1,225,909)
Cash and cash equivalents, beginning of period	16,257,694	17,842,555
Cash and cash equivalents, end of period	16,484,132	16,616,646
Cash paid for income taxes	$ 528,714	$ 278,871