Long-Term Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Mar. 31, 2016
Long-term debt
Total long-term debt	$ 5,339	$ 4,767
Less current maturities	(242)	(746)
Long-term debt, less current maturities	5,097	4,021
Revolving credit facility
Long-term debt
Total long-term debt	4,860	3,719
Harris seller's note
Long-term debt
Total long-term debt	0	546
Equipment lease obligations
Long-term debt
Total long-term debt	425	345
Customer equipment finance notes payable
Long-term debt
Total long-term debt	13	90
Other long-term debt
Long-term debt
Total long-term debt	$ 41	$ 67