Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current assets
Cash and cash equivalents	$ 36,759	$ 8,135
Short-term marketable securities	25,137	250
Accounts receivable, net of allowance for doubtful accounts of $154 and $97 as of December 31, 2012 and December 31, 2011, respectively	15,791	11,533
Inventory	4,619	3,797
Prepaid expenses and other current assets	5,364	3,430
Deferred tax assets	609	932
Income taxes receivable	1,877
Total current assets	90,156	28,077
Property and equipment, net	45,316	34,249
Long-term marketable securities	36,965
Other assets	285
Total assets	172,722	62,326
Current liabilities
Accounts payable	4,758	4,431
Accrued compensation	5,995	4,767
Accrued liabilities and other	513	318
Income taxes payable		33
Current portion of long-term debt obligations	273	390
Total current liabilities	11,539	9,939
Deferred tax liabilities	3,346	4,252
Long-term debt obligations	356	613
Other	782	871
Shareholders' equity (deficit)
Preferred stock, $0.001 par value, authorized 10,000,000 and 0 shares; issued and outstanding 0 shares as of December 31, 2012 and December 31, 2011, respectively
Common stock, $0.001 par value, authorized 150,000,000 shares; issued and outstanding 24,803,640 and 9,706,270 shares as of December 31, 2012 and December 31, 2011, respectively	25	10
Additional paid in capital	147,032	8,229
Accumulated equity (deficit)	10,570	(27,744)
Accumulated other comprehensive income (loss)	(928)	(738)
Total shareholders' equity (deficit)	156,699	(20,243)
Total liabilities, redeemable convertible preferred stock, redeemable common stock and shareholders' equity (deficit)	172,722	62,326
Redeemable Convertible Preferred Stock
Redeemable convertible stock
Redeemable stock		66,075
Redeemable Common Stock
Redeemable convertible stock
Redeemable stock		$ 819