Intangible Assets (Tables)

12 Months Ended

Mar. 31, 2017

Intangible Assets

Schedule of intangible assets

Intangible assets consisted of the following (in thousands):

	March 31, 2017
	Weighted
	Average	Intangible
	Amortization	Assets,		Accumulated		Intangible
	Period	Gross		Amortization		Assets, Net
Manufacturing license	17 years	$	3,700	$	3,684	$	16
Technology	10 years		2,240		1,605		635
Trade name & parts, service and TA100 customer relationships	1.2 to 5 years		1,766		1,766		—
Total		$	7,706	$	7,055	$	651

	March 31, 2016
	Weighted
	Average	Intangible
	Amortization	Assets,		Accumulated		Intangible
	Period	Gross		Amortization		Assets, Net
Manufacturing license	17 years	$	3,700	$	3,635	$	65
Technology	10 years		2,240		1,381		859
Backlog	Various		490		473		17
Trade name & parts, service and TA100 customer relationships	1.2 to 5 years		1,766		1,766		—
Total		$	8,196	$	7,255	$	941

Schedule of expected future amortization expense of intangible assets

Expected future amortization expense of intangible assets as of March 31, 2017 is as follows (in thousands):

	Amortization
Year Ending March 31,	Expense
2018		240
2019		224
2020		187
Thereafter		—
Total expected future amortization	$	651