CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)	6 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities:
Net income	$ 682,364	$ 478,532
Adjustments to reconcile net income to net cash provided by operating activities:
Deferred income taxes	277,504	385,865
Depreciation and amortization	71,390	82,372
Provision for inventory obsolescence	15,000	30,713
Amortization of deferred financing costs	2,713	2,715
Change in fair value of common stock warrant	(251,203)	450,828
Non-cash stock-based compensation	16,358	15,043
Changes in assets and liabilities:
(Increase) decrease in accounts receivable	(406,895)	764,315
Decrease (increase) in inventories	988,244	(684,702)
Decrease (increase) in prepaid expenses & other assets	42,789	(96,758)
Decrease in accounts payable and other accrued expenses	(678,052)	(555,336)
Decrease in federal and state taxes	(53,623)	0
(Decrease) increase in accrued payroll, vacation pay & withholdings	(257,011)	95,790
Increase (decrease) in deferred revenues	405,073	(4,708)
Decrease in other long-term liabilities	(7,800)	(12,600)
Net cash generated by operating activities	846,851	952,069
Cash flows from investing activities:
Purchases of equipment	(30,303)	(35,772)
Net cash used in investing activities	(30,303)	(35,772)
Cash flows from financing activities:
Proceeds from bank loan	0	18,000
Payment of warrant liability	(720,000)	0
Repayment of long-term debt	(205,838)	(191,748)
Repayment of subordinated notes - related parties	(25,000)	(125,000)
Repayment of capitalized lease obligations	(7,809)	(8,088)
Net cash used in financing activities	(958,647)	(306,836)
Net (decrease) increase in cash and cash equivalents	(142,099)	609,461
Cash and cash equivalents at beginning of period	972,633	185,932
Cash and cash equivalents at end of period	830,534	795,393
Supplemental cash flow information:
Taxes paid	50,000	0
Interest paid	$ 32,642	$ 32,834