Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash flows from operating activities:
Net income (loss)	$ 4,266	$ (8,696)
Depreciation and amortization	1,117	1,105
Deferred tax provision	(201)	(19,511)
Deferred charge	504	23,754
Stock-based compensation	1,376	1,683
Amortization of premiums on investments	81	49
Notes payable paid-in-kind interest		1,656
Unrealized currency translations gains	(1,800)
Changes in operating assets and liabilities:
Accounts receivable	(1,334)	3,381
Unbilled accounts receivable	732	1,464
Product royalties receivable	581	(2,551)
Inventory	(218)	87
Prepaid and income taxes receivable and payable, net	(2,159)	(467)
Accounts payable	(2,428)	(3,513)
Accrued expenses	(4,231)	(1,853)
Deferred revenue	(3,039)	(45)
Accrued interest payable	395
Other assets and liabilities, net	(1,820)	(1,711)
Net cash used in operating activities	(8,178)	(5,168)
Cash flows from investing activities:
Purchases of investments	(7,910)	(5,929)
Proceeds from the sales of investments		750
Maturities of investments	5,760	24,345
Purchases of property and equipment	(153)	(306)
Purchases of intangible assets		(3,000)
Purchase of other investing activities		(432)
Restricted cash	(10,031)	(1,364)
Net cash provided by (used in) investing activities	(12,334)	14,064
Cash flows from financing activities:
Proceeds from notes payable	10,600
Repayment of notes payable	(3,725)
Proceeds from exercise of stock options	1,543	67
Purchase of treasury stock	(336)	(556)
Proceeds from employee stock purchase plan	17	15
Windfall tax benefit from stock-based compensation	304
Net cash provided by (used in) financing activities	8,403	(474)
Effect of exchange rates on cash and cash equivalents	(2)	(1,838)
Net increase (decrease) in cash and cash equivalents	(12,111)	6,584
Cash and cash equivalents at beginning of period	52,022	50,662
Cash and cash equivalents at end of period	39,911	57,246
Supplemental disclosure of non-cash investing and financing activities:
Purchase of other investing activities included in accounts payable		$ 2