Note 13 - Income Taxes (Tables)

12 Months Ended

Mar. 31, 2014

Income Tax Disclosure [Abstract]

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

	Year Ended March 31,
	2014		2013
Current:
Federal	$	36,000	$	820,000
State		176,000		146,000
Foreign		69,000		69,000
Total current		281,000		1,035,000
Deferred:
Federal		779,000		21,000
State		132,000		4,000
Total deferred		911,000		25,000
Total	$	1,192,000	$	1,060,000

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	Year Ended March 31,
	2014				2013
Income tax provision at U.S. statutory rate	$	904,000	34.0	%	$	928,000	34.0	%
State income taxes, net of Federal benefit		203,000	7.6			99,000	3.6
Permanent differences, other		15,000	0.6			30,000	1.1
Other differences, net		70,000	2.6			3,000	0.1
Income tax provision	$	1,192,000	44.8	%	$	1,060,000	38.8	%

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

	March 31,
	2014			2013
Inventory reserves	$	279,000		$	296,000
Accrued vacation		237,000			227,000
Stock option compensation		150,000			360,000
Warranty reserve		88,000			78,000
Accounts and notes receivable reserve		57,000			25,000
Net operating loss carryforwards		91,000			-
Federal credits		69,000			-
Other		17,000			16,000
Gross deferred tax assets		988,000			1,002,000
Prepaid expenses		(616,000	)		(232,000	)
Property and equipment		(1,004,000	)		(429,000	)
Gross deferred tax liabilities		(1,620,000	)		(661,000	)
Net deferred tax (liability) asset	$	(632,000	)	$	341,000