Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets (Details)

Intangible Assets (Details) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
Intangible Assets (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Mar. 31, 2014
Intangible Assets
Intangible Assets, Gross	$ 8,196,000		$ 8,196,000		$ 8,196,000
Accumulated Amortization	6,773,000		6,773,000		6,406,000
Total expected future amortization	1,423,000		1,423,000		1,790,000
Amortization expense	100,000us-gaap_AmortizationOfIntangibleAssets	100,000us-gaap_AmortizationOfIntangibleAssets	400,000us-gaap_AmortizationOfIntangibleAssets	400,000us-gaap_AmortizationOfIntangibleAssets
Expected future amortization expense of intangible assets
2015	145,000		145,000
2016	352,000		352,000
2017	273,000		273,000
2018	242,000		242,000
2019	224,000		224,000
Thereafter	187,000		187,000
Total expected future amortization	1,423,000		1,423,000		1,790,000
Manufacturing license
Intangible Assets
Weighted Average Amortization Period			17 years		17 years
Intangible Assets, Gross	3,700,000		3,700,000		3,700,000
Accumulated Amortization	3,573,000		3,573,000		3,536,000
Total expected future amortization	127,000		127,000		164,000
Expected future amortization expense of intangible assets
Total expected future amortization	127,000		127,000		164,000
Technology
Intangible Assets
Weighted Average Amortization Period			10 years		10 years
Intangible Assets, Gross	2,240,000		2,240,000		2,240,000
Accumulated Amortization	1,101,000		1,101,000		933,000
Total expected future amortization	1,139,000		1,139,000		1,307,000
Expected future amortization expense of intangible assets
Total expected future amortization	1,139,000		1,139,000		1,307,000
Parts and service customer relationships
Intangible Assets
Weighted Average Amortization Period			5 years		5 years
Intangible Assets, Gross	1,080,000		1,080,000		1,080,000
Accumulated Amortization	1,062,000		1,062,000		900,000
Total expected future amortization	18,000		18,000		180,000
Expected future amortization expense of intangible assets
Total expected future amortization	18,000		18,000		180,000
TA100 customer relationships
Intangible Assets
Weighted Average Amortization Period			2 years		2 years
Intangible Assets, Gross	617,000		617,000		617,000
Accumulated Amortization	617,000		617,000		617,000
Backlog
Intangible Assets
Intangible Assets, Gross	490,000		490,000		490,000
Accumulated Amortization	351,000		351,000		351,000
Total expected future amortization	139,000		139,000		139,000
Expected future amortization expense of intangible assets
Total expected future amortization	139,000		139,000		139,000
Trade name
Intangible Assets
Weighted Average Amortization Period			1 year 2 months 12 days		1 year 2 months 12 days
Intangible Assets, Gross	69,000		69,000		69,000
Accumulated Amortization	$ 69,000		$ 69,000		$ 69,000