CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)	3 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities:
Net (loss) income	$ (286,091)	$ 410,309
Adjustments to reconcile net (loss) income to net cash used in operating activities:
Deferred income taxes	0	167,744
Depreciation and amortization	21,522	35,010
Provision for inventory obsolescence	5,000	15,000
Amortization of deferred financing costs	1,357	1,356
Change in fair value of common stock warrant	(95,000)	(217,203)
Non-cash stock-based compensation	8,179	8,179
Changes in assets and liabilities:
Decrease (increase) in accounts receivable	334,926	(811,605)
Decrease in inventories	37,849	615,748
Decrease (increase) in prepaid expenses & other assets	109,224	(635,780)
Decrease in accounts payable and other accrued expenses	(197,378)	(335,444)
Decrease in federal and state taxes	0	(53,623)
Decrease in accrued payroll, vacation pay & withholdings	(26,383)	(75,898)
(Decrease) increase in deferred revenues	(35,925)	481,277
Decrease in other long-term liabilities	0	(6,300)
Net cash used in operating activities	(122,720)	(401,230)
Cash flows from investing activities:
Purchases of equipment	(21,506)	(25,307)
Net cash used in investing activities	(21,506)	(25,307)
Cash flows from financing activities:
Proceeds from line of credit	200,000	0
Repayment of long-term debt	(107,329)	(102,128)
Repayment of subordinated notes - related parties	0	(25,000)
Repayment of capitalized lease obligations	(1,514)	(6,398)
Net cash provided by (used in) financing activities	91,157	(133,526)
Net decrease in cash and cash equivalents	(53,069)	(560,063)
Cash and cash equivalents at beginning of period	287,873	972,633
Cash and cash equivalents at end of period	234,804	412,570
Supplemental cash flow information:
Taxes paid	0	50,000
Interest paid	$ 28,524	$ 21,504