Note 2 - Segment Information (Details) - Key Financial Highlights by Reportable Segments (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2014	Mar. 31, 2013
2014
Net sales	$ 4,981	$ 4,507	$ 3,968	$ 3,652	$ 4,200	$ 3,952	$ 3,739	$ 3,396	$ 17,108	$ 15,287
Gross profit	845	1,378	1,195	1,080	1,227	1,132	1,070	913	4,498	4,342
Operating (loss) income									(7,444)	(8,477)
Depreciation and amortization									695	795
Assets	10,833				11,377				10,833	11,377
Expenditures for fixed assets									53	95
Medical [Member]
2014
Net sales									14,133	11,630
Gross profit									3,469	3,102
Operating (loss) income									(7,435)	(8,381)
Depreciation and amortization									684	772
Assets	11,243				11,833				11,243	11,833
Expenditures for fixed assets									53	95
Industrial [Member]
2014
Net sales									2,975	3,657
Gross profit									1,029	1,240
Operating (loss) income									(9)	(96)
Depreciation and amortization									11	23
Assets	1,775				1,466				1,775	1,466
Adjustments [Member]
2014
Assets	$ (2,185)				$ (1,922)				$ (2,185)	$ (1,922)