Borrowing Arrangements (Details) (USD $)	9 Months Ended
	Sep. 30, 2012 Installment Term_Loans	May 31, 2009
Borrowing Arrangements (Additional Textual) [Abstract]
Line of credit available for general working capital needs	$ 5,000,000
Letter of credit sub-facility	5,000,000
Foreign exchange sub-facility	2,000,000
Interest rates under the amended agreement variable alternate base rate	1.00%
Fed Funds Rate	0.50%
Daily adjusted one-month LIBOR	1.00%
Borrowings under the line of credit	15,000,000
Loan facility to finance the repurchase of shares of the Company's common stock		15,000,000
Number of equal monthly installments for borrowings	21
Number of term loans under acquisition	2
PhaseLink Acquisition [Member]
Borrowing Arrangements (Additional Textual) [Abstract]
Loans acquired with local bank in Taiwan	$ 282,000
Minimum [Member]
Borrowing Arrangements (Additional Textual) [Abstract]
Interest rates under the amended agreement, floating	2.00%
Maximum [Member]
Borrowing Arrangements (Additional Textual) [Abstract]
Interest rates under the amended agreement, floating	2.25%