Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Current assets :
Cash and cash equivalents	$ 30,748	$ 30,647
Trade and other accounts receivable, net of allowance for doubtful accounts of $159 and $134, at June 30, 2014 and December 31, 2013, respectively	39,850	29,869
Inventories	44,973	44,736
Prepaid expenses and other current assets	3,170	2,314
Total current assets	118,741	107,566
Property and equipment, net	42,192	44,941
Intangible assets, net	268	369
Goodwill	26,140	25,978
Pension asset	11,139	10,568
Other non-current assets	665	665
Total assets	199,145	190,087
Current liabilities:
Accounts payable and accrued liabilities	26,643	25,436
Accrued warranty	583	180
Accrued employee compensation	8,935	8,788
Deferred revenue and customer deposits	3,181	1,043
Short-term borrowings and current portion of long-term debt	10,106	7,914
Deferred tax liability	874	890
Total current liabilities	50,322	44,251
Deferred tax liability, long-term	2,155	2,125
Long-term debt, excluding current portion	65	100
Other long-term liabilities	3,513	3,401
Total liabilities	56,055	49,877
Commitments and contingencies (Note 8)
Stockholders' equity:
Common stock, $0.10 par value per share, 40,000 shares authorized; 29,897 and 29,563 shares issued and outstanding at June 30, 2014 and December 31, 2013, respectively	2,987	2,953
Additional paid-in capital	274,946	271,928
Accumulated deficit	(152,656)	(151,794)
Accumulated other comprehensive income	17,813	17,123
Total stockholders' equity	143,090	140,210
Total liabilities and stockholders' equity	$ 199,145	$ 190,087