Note Payable to Bank and Long-Term Debt (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Note Payable:
MtronPTI revolving loan with J.P. Morgan Chase Bank, N.A. ("Chase") due June 30, 2013. The loan bears interest at the greater of Chase's prime rate or the one-month LIBOR rate plus 2.50% per annum (3.25% at March 31, 2013), which is due and payable monthly.	$ 1,382,000	$ 1,249,000
Long-Term Debt:
MtronPTI term loan	0	58,000
Less: Current maturities	0	58,000
Long-Term Debt	0	0
Financial covenants under chase loan agreement [Abstract]
Tangible net worth as financial covenant, minimum	8,000,000
Revolving loan [Member]
Long-Term Debt:
Debt instrument, reference rate (in hundredths)	2.50%
Revolving loan, interest rate (in hundredths)	3.25%
Debt instrument, maturity due date	Jun. 30, 2013
Financial covenants under chase loan agreement [Abstract]
Debt instrument, reference rate	one-month LIBOR rate
Term loan [Member]
Long-Term Debt:
Less: Current maturities	$ 0	$ 58,000
Debt instrument, maturity due date	Feb. 07, 2013