Consolidated Statements of Cash Flows (USD $)	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash flows from operating activities:
Net income (loss)	$ 6,530,300	$ (1,648,709)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	32,349	9,770
Stock-based compensation expense	391,138	1,710,992
Changes in operating assets and liabilities:
Accounts receivable	286,236	116,965
Deferred tax assets	(3,051,197)	0
Prepaid expenses and other current assets	(223,807)	(67,679)
Accounts payable and accrued expenses	(2,832,456)	457,547
Deferred revenue	(374,494)	(651,836)
Net cash provided by (used in) operating activities	758,069	(72,950)
Cash flows from investing activities:
Maturity of marketable investments	5,360,970	4,548,541
Purchases of marketable investments	(5,000,000)	(5,360,970)
Net cash provided by (used in) investing activities	360,970	(812,429)
Cash flows from financing activities:
Proceeds from stock option exercises	82,450	653,375
Payments for repurchase of common stock	(360,447)	(418,757)
Excess tax benefits from share-based payment arrangements	483,869	0
Net cash provided by (used in) financing activities	205,872	234,618
Increase (decrease) in cash and cash equivalents	1,324,911	(650,761)
Cash and cash equivalents at beginning of year	2,470,852	3,950,389
Cash and cash equivalents at end of period	3,795,763	3,299,628
Cash paid during the year for:
Interest	0	0
Taxes	$ 190,000	$ 9,851