Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)	Jun. 30, 2019	Mar. 31, 2019
Current assets:
Cash and cash equivalents	$ 1,456,633	$ 1,555,687
Accounts receivable, net of allowance for doubtful accounts of $160,000 at June 30, 2019 and March 31, 2019	1,008,913	916,844
Inventories	424,825	326,308
Prepaid expenses and other current assets	51,930	28,582
Total current assets	2,942,301	2,827,421
Property and equipment, net of accumulated depreciation of $117,475 and $108,099 at June 30, 2019 and March 31, 2019, respectively	86,085	95,461
Right of use assets - operating leases	941,875
Accounts receivable-related party	330,090	330,090
Inventories - long-term portion	85,457	85,457
Intangible assets, net of accumulated amortization of $12,384 and $12,035 at June 30, 2019 and March 31, 2019, respectively	8,550	8,899
Other assets	90,764	90,764
Deferred tax asset	1,086,000	1,107,000
Total other assets	2,628,821	1,717,671
Total assets	5,571,122	4,545,092
Current liabilities:
Current portion of obligations under operating leases	101,875
Current portion of obligations under capital leases	31,196	31,196
Line of credit	35,123	169,885
Accounts payable	283,303	275,591
Accrued expenses and other current liabilities	121,517	150,549
Customer deposits	514,186	321,441
Due to stockholder	142,092	139,322
Total current liabilities	1,229,292	1,087,984
Long-term liabilities
Noncurrent portion of obligations under capital leases	14,403	22,450
Noncurrent portion of obligations under operating leases	840,000
Total long-term liabilities	854,403	22,450
Total liabilities	2,083,695	1,110,434
Stockholders' equity:
Preferred stock, $.01 par value; 5,000,000 shares authorized, no shares issued and outstanding
Common stock, $0.0005 par value; 150,000,000 shares authorized, 67,588,492 shares issued and outstanding	33,794	33,794
Additional paid-in capital	33,294,069	33,294,069
Accumulated deficit	(29,840,436)	(29,893,205)
Total stockholders' equity	3,487,427	3,434,658
Total liabilities and stockholders' equity	$ 5,571,122	$ 4,545,092