Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Operating activities:
Net income	$ 11,794	$ 9,518
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	533	531
Gain on write-off and disposal of assets		(11)
Stock-based compensation	561	413
Non-cash compensation on issuance of subscription rights		54
Interest accrued on note payable		35
Deferred tenant inducements	(50)	133
Foreign exchange loss (gain)	52	23
Changes in operating assets and liabilities:
Accounts receivable	267	(1,022)
Prepaid expenses, and other current assets	(27)	(81)
Accounts payable and accrued expenses	614	2,145
Deferred revenue	(10,527)	(12,374)
Net cash provided by (used in) operating activities	3,217	(636)
Investing activities:
Purchases of property, plant and equipment	(753)	(115)
Sale of property, plant and equipment		10
Purchase of marketable securities	(15,334)	(9,513)
Proceeds from marketable securities	11,803
Net cash used in investing activities	(4,284)	(9,618)
Financing activities:
Note payable		(1,701)
Deferred financing costs	(1,305)	(2,713)
Proceeds from issuance of common shares	10	14
Net cash used in financing activities	(1,295)	(4,400)
Effect of exchange rate changes on cash and cash equivalents	(1,857)	(1,897)
Decrease in cash and cash equivalents	(4,219)	(16,551)
Cash and cash equivalents, beginning of period	37,950	60,162
Cash and cash equivalents, end of period	33,731	43,611
Non-cash transactions:
Fair value of stock options transferred from additional paid-in capital to share capital on exercise	9	36
Issuance of common shares on conversion of subscription rights	32	19
Interest paid		$ (35)