Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Current assets :
Cash and cash equivalents	$ 37,047	$ 28,739
Restricted cash	4,050	0
Trade and other accounts receivable, net of allowance for doubtful accounts of $133 and $157, at September 30, 2013 and December 31, 2012, respectively	29,370	33,420
Inventories	42,576	41,620
Prepaid expenses and other current assets	3,190	3,228
Total current assets	116,233	107,007
Property and equipment, net	41,976	36,235
Intangible assets, net	420	669
Goodwill	25,678	25,416
Pension asset	7,733	6,939
Other non-current assets	331	206
Total assets	192,371	176,472
Current liabilities:
Accounts payable and accrued liabilities	29,829	27,181
Accrued warranty	129	269
Accrued employee compensation	8,344	4,743
Deferred revenue	2,594	6,408
Short-term borrowings and current portion of long-term debt	8,253	9,452
Deferred tax liability	980	980
Total current liabilities	50,129	49,033
Deferred tax liability, long-term	1,376	1,384
Long-term debt, excluding current portion	86	83
Other long-term liabilities	2,280	1,039
Total liabilities	53,871	51,539
Commitments and contingencies (Note 10)
Stockholders' equity:
Common stock, $0.10 par value per share, 40,000 shares authorized; 29,641 and 29,162 shares issued and outstanding at September 30, 2013 and December 31, 2012, respectively	2,961	2,913
Additional paid-in capital	270,455	267,623
Accumulated deficit	(148,980)	(158,134)
Accumulated other comprehensive income	14,064	12,531
Total stockholders' equity	138,500	124,933
Total liabilities and stockholders' equity	$ 192,371	$ 176,472