Note 9 - Summary of Quarterly Results of Operations (Unaudited) (Tables)

12 Months Ended

Mar. 31, 2016

Notes Tables

Quarterly Financial Information [Table Text Block]

	Quarter Ended
	June 30, 2015		September 30, 2015			December 31, 2015		March 31, 2016
Net sales	$	23,968,569	$	23,165,705		$	18,548,247	$	15,948,861
Gross profit		2,141,893		907,703			1,467,289		176,759
Net earnings (loss)		525,949		(193,294	)		485,120		(523,775	)
Basic (1)		.08		(.03	)		.07		(.08	)
Diluted (1)		.08		(.03	)		.07		(.08	)

	Quarter Ended
	June 30, 2014			September 30, 2014		December 31, 2014		March 31, 2015
Net sales	$	27,904,521		$	31,544,474	$	23,552,636	$	25,321,149
Gross profit		1,042,061			2,420,929		1,258,797		356,281
Net earnings (loss)		(118,250	)		765,655		187,643		(452,718	)
Basic (1)		(.02	)		.11		.03		(.07	)
Diluted (1)		(.02	)		.11		.03		(.07	)