Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 42,035	$ 40,979
Marketable securities, current	12,512	0
Trade receivables, net of allowances of $38 and $53	13,394	25,336
Inventories	13,462	15,824
Prepaids and other current assets	4,389	6,927
Income taxes receivable	31	80
Deferred income tax assets	5,237	4,441
Total current assets	91,060	93,587
Marketable securities, long-term	1,006	0
Property, plant and equipment, net	8,670	8,499
Goodwill	2,649	2,740
Other intangible assets, net	12,105	12,615
Long-term deferred income tax assets	22,333	25,725
Other assets	307	401
Total assets	138,130	143,567
Liabilities and Shareholders' Equity
Trade payables	27,320	37,192
Accrued liabilities	7,836	9,123
Warranty obligations, current portion	1,983	1,610
Total current liabilities	37,139	47,925
Warranty obligations, non-current	0	28
Income taxes payable, non-current	2,664	2,577
Other long-term liabilities	1,359	1,472
Total liabilities	41,162	52,002
Commitments and contingencies (Note 12)
Shareholders' equity:
Common stock - no par value, 75,000 shares authorized, 31,188 and 31,162 shares issued and outstanding	6,975	6,769
Retained earnings	89,926	84,552
Accumulated other comprehensive income	67	244
Total shareholders' equity	96,968	91,565
Total liabilities and shareholders' equity	$ 138,130	$ 143,567