Accounts payable Accounts receivable, net of allowance for doubtful accounts of $292 and $655 as of September 30, 2008 and December 31, 2007, respectively Accrued liabilities Accumulated other comprehensive income, net of tax Payments to Acquire Businesses and Interest in Affiliates Additional paid-in capital Cash, cash equivalents and marketable securities investments Cash and cash equivalents CASH AND CASH EQUIVALENTS, end of period CASH AND CASH EQUIVALENTS, beginning of period Accounts receivable Inventories Prepaid expenses and other assets Accounts payable Accrued liabilities Common stock, $0.10 par value - Authorized - 80,000,000 shares, issued 14,746,951 shares at September 30, 2008 and December 31, 2007 Comprehensive income COST OF GOODS SOLD Total current liabilities Depreciation and amortization NET INCOME PER SHARE - Diluted Effect of exchange rate changes on cash Stock compensation Gross profit INTANGIBLE ASSETS, net Inventories Marketable securities MINORITY INTEREST Minority interest Net cash provided (used) by financing activities Net cash provided (used) by investing activities Net cash provided by operating activities NET INCOME Net income NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS Proceeds from employee stock purchase plan Nonoperating Income (Expense) [Abstract] OTHER INCOME Income from operations TOTAL REVENUE Other comprehensive loss, net of tax: Unrealized loss on investments Prepaid income taxes Proceeds from sale of marketable securities Proceeds from exercise of stock options PROPERTY AND EQUIPMENT, net Provision for doubtful accounts Purchases of marketable securities Purchases of property and equipment Purchase of treasury stock Retained earnings Net sales Selling, general and administrative Total current assets WEIGHTED AVERAGE NUMBER OF SHARES - Diluted WEIGHTED AVERAGE NUMBER OF SHARES - Basic Research and development DEFERRED INCOME TAXES - non-current Deferred income taxes - current portion DEFERRED INCOME TAXES - non-current portion Treasury stock, at cost - 379,509 and 1,057,501 shares at September 30, 2008 and December 31, 2007, respectively NET INCOME PER SHARE - Basic Tax benefits from exercise of stock options OTHER ASSETS Total operating expenses, net Income before income taxes and minority interest Other comprehensive loss, net of tax: Foreign currency translation adjustment Total stockholders' equity PROVISION FOR INCOME TAXES Convertible preferred stock, $1.00 par value - Authorized - 500,000 shares, issued and outstanding - none COMMITMENTS AND CONTINGENCIES Proceeds from finance loan repayments INCOME TAXES RECEIVABLE - non-current Carrying amount as of the balance sheet date of amounts due in more than one year from income tax authorities. Prepaid expenses and other current assets Sum of the amounts paid in advance for capitalized costs that will be expensed with the passage of time or the occurrence of a triggering event, and will be charged against earnings within one year or the normal operating cycle, if longer, and the aggregate carrying amount, as of the balance sheet date, of current assets not separately disclosed in the balance sheet due to materiality considerations. INCOME TAXES PAYABLE - non-current portion The noncurrent portion as of the balance sheet date of the unpaid sum of the known and estimated amounts payable to satisfy all domestic and foreign income tax obligations. Prepaid and deferred income taxes The net change during the reporting period in the carrying amount as of the balance sheet date of payments made in advance for income and other taxes, which will be charged against earnings within one year or the normal operating cycle, if longer, as well as the current portion of the aggregate tax effects as of the balance sheet date of all future tax deductions arising from temporary differences between tax basis and generally accepted accounting principles basis recognition of assets, liabilities, revenues and expenses, which can only be deducted for tax purposes when permitted under enacted tax laws; after deducting the allocated valuation allowance, if any, to reduce such amount to net realizable value. Other Revenue earned during the period from sources other than specified elsewhere in the taxonomy. Cash Paid for Acquired Assets Cash paid for acquired assets The cash paid for acquired assets, including intangible assets and property and equipment. Document and Entity Information [Abstract]