Long-Term Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Mar. 31, 2015
Long-term debt
Total long-term debt	$ 6,453	$ 5,054
Current maturities	(1,164)	(1,832)
Long-term debt, less current maturities	5,289	3,222
Revolving credit facility
Long-term debt
Total long-term debt	4,973	2,500
Harris seller's note
Long-term debt
Total long-term debt	816	1,607
Customer equipment finance notes payable
Long-term debt
Total long-term debt	235	827
Equipment lease obligations
Long-term debt
Total long-term debt	350	0
Other long-term debt
Long-term debt
Total long-term debt	$ 79	$ 120