Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)	Jun. 30, 2020	Mar. 31, 2020
Current assets:
Cash and cash equivalents	$ 1,575,472	$ 1,438,714
Accounts receivable, net of allowance for doubtful accounts of $225,000 at June 30, 2020 and March 31, 2020, respectively	837,581	860,539
Inventories	452,098	372,635
Prepaid expenses and other current assets	49,180	23,525
Total current assets	2,914,331	2,695,413
Property and equipment, net of accumulated depreciation of $154,978 and $145,602 June 30, 2020 and March 31, 2020, respectively	48,582	57,958
Right-of-use asset	689,597	706,307
Accounts receivable-related party	330,090	330,090
Inventories - long-term portion	132,080	132,080
Intangible assets, net of accumulated amortization of $14,710 and $14,093 at June 30, 2020 and March 31, 2020, respectively	21,084	21,703
Other assets	90,538	90,538
Deferred tax asset	1,061,000	1,019,000
Total other assets	2,372,971	2,357,676
Total assets	5,287,302	5,053,089
Current liabilities:
Paycheck Protection Program Loan	381,000
Financing lease payable	13,412	21,458
Line of credit	55,000	30,000
Operating lease liability - current	68,961	68,106
Accounts payable	281,058	365,475
Accrued expenses and other current liabilities	108,312	136,188
Customer deposits	451,030	354,745
Due to stockholder	84,730	100,017
Total current liabilities	1,443,503	1,075,989
Long-term liabilities
Operating lease liability - noncurrent	620,636	638,201
Total long-term liabilities	620,636	638,201
Total liabilities	2,064,139	1,714,190
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, 67,588,504 shares issued and outstanding	33,794	33,794
Additional paid-in capital	33,294,069	33,294,069
Accumulated deficit	(30,104,700)	(29,988,964)
Total stockholders' equity	3,223,163	3,338,899
Total liabilities and stockholders' equity	$ 5,287,302	$ 5,053,089