Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)	Dec. 31, 2019	Mar. 31, 2019
Current assets:
Cash and cash equivalents	$ 1,601,435	$ 1,555,687
Accounts receivable, net of allowance for doubtful accounts of $160,000 for each period	712,141	916,844
Inventories	523,240	326,308
Prepaid expenses and other current assets	106,922	28,582
Total current assets	2,943,738	2,827,421
Property and equipment, net of accumulated depreciation of $136,226 and $108,099 at December 31, 2019 and March 31, 2019, respectively	67,334	95,461
Right-of-use asset	719,825
Accounts receivable-related party	330,090	330,090
Inventories - long-term portion	85,457	85,457
Intangible assets, net of accumulated amortization of $13,082 and $12,035 at December 31, 2019 and March 31, 2019, respectively	7,852	8,899
Other assets	90,538	90,764
Deferred tax asset	1,025,000	1,107,000
Total other assets	2,326,096	1,717,671
Total assets	5,269,834	4,545,092
Current liabilities:
Capital lease payable	29,505	31,196
Line of credit		169,885
Accounts payable	288,132	275,591
Accrued expenses and other current liabilities	135,120	150,549
Customer deposits	668,244	321,441
Current operating lease liability	68,588
Due to stockholder	123,117	139,322
Total current liabilities	1,312,766	1,087,984
Long-term liabilities
Capital lease payable, net of current portion	0	22,450
Operating lease liability, net of current portion	616,654
Total long-term liabilities	616,654	22,450
Total liabilities	1,929,360	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	(29,987,390)	(29,893,205)
Total stockholders' equity	3,340,473	3,434,658
Total liabilities and stockholders' equity	$ 5,269,833	$ 4,545,092