Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Operating Activities:
Net income (loss)	$ (1,693)	$ 51,477
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	850	444
Deferred income tax expense		5,385
Stock-based compensation expense	289	545
Changes in operating assets and liabilities:
Accounts receivable	(1,748)	804
Inventories	(18)	(19)
Income tax receivable	(670)
Prepaid expenses and other	193	(569)
Accounts payable	920	(557)
Accrued liabilities	(829)	(303)
Income tax payable	(748)	8,919
Accrued income taxes		353
Excess tax benefit from stock options		(2,300)
Deferred revenue	158	106
Net cash provided by (used in) operating activities	(3,296)	64,285
Investing Activities:
Purchases of property and equipment	(50)	(1,220)
Acquisition of selling arrangement		(4,000)
Proceeds from sale of investments		500
Net cash used in investing activities	(50)	(4,720)
Financing Activities:
Proceeds from issuance of common stock, net	131	3,125
Excess tax benefit from stock options		2,300
Dividends paid		(31,335)
Repurchase of common stock, net	(213)	(14,921)
Net cash used in financing activities	(82)	(40,831)
Increase (decrease) in cash and cash equivalents	(3,428)	18,734
Cash and cash equivalents at beginning of period	23,202	13,196
Cash and cash equivalents at end of period	19,774	31,930
Supplemental disclosures for cash flow information:
Cash paid for income taxes	639	17,746
Non-cash investing and financing activities:
Cashless exercise of stock options		$ 800