Consolidated Statements Of Stockholders' Equity (USD $)	Common Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]	Total
BALANCE at Dec. 31, 2010	$ 30,330,000	$ (586,000)	$ 18,573,000	$ 48,317,000
BALANCE, shares at Dec. 31, 2010	6,891,000
Excess tax benefit from exercise of stock options, net of deferred tax shortfall related to stock options and restricted stock units	3,000			3,000
Exercise of stock options, vesting of restricted stock units, net of shares exchanged as payment	1,000			1,000
Exercise of stock options, vesting of restricted stock units, net of shares exchanged as payment, shares	13,000
Share issuances for compensation purposes	41,000			41,000
Share issuances for compensation purposes, shares	4,000
Stock compensation	389,000			389,000
Issuance of common stock under Employee Stock Purchase Plan	201,000			201,000
Issuance of common stock under Employee Stock Purchase Plan, shares	25,000
Market value adjustments of marketable securities, net of reclassification adjustment		20,000		20,000
Unrealized loss on foreign exchange forward contracts, net of reclassification adjustment		(323,000)		(323,000)
Cumulative translation adjustment		(37,000)		(37,000)
Net income (loss)			4,357,000	4,357,000
BALANCE at Dec. 31, 2011	30,965,000	(926,000)	22,930,000	52,969,000
BALANCE, shares at Dec. 31, 2011	6,933,000
Excess tax benefit from exercise of stock options, net of deferred tax shortfall related to stock options and restricted stock units	(149,000)			(149,000)
Exercise of stock options, vesting of restricted stock units, net of shares exchanged as payment	27,000			27,000
Exercise of stock options, vesting of restricted stock units, net of shares exchanged as payment, shares	15,000
Share issuances for compensation purposes	41,000			41,000
Share issuances for compensation purposes, shares	5,000
Stock compensation	408,000			408,000
Issuance of common stock under Employee Stock Purchase Plan	139,000			139,000
Issuance of common stock under Employee Stock Purchase Plan, shares	20,000
Repurchase of common stock	(21,000)			(21,000)
Repurchase of common stock, shares	(3,000)			(2,940)
Market value adjustments of marketable securities, net of reclassification adjustment		(41,000)		(41,000)
Unrealized loss on foreign exchange forward contracts, net of reclassification adjustment		434,000		434,000
Cumulative translation adjustment		376,000		376,000
Net income (loss)			(6,711,000)	(6,711,000)
BALANCE at Dec. 31, 2012	$ 31,410,000	$ (157,000)	$ 16,219,000	$ 47,472,000
BALANCE, shares at Dec. 31, 2012	6,970,000