CONDENSED BALANCE SHEETS (Unaudited) - USD ($)	Mar. 31, 2019	Dec. 31, 2018
CURRENT ASSETS
Cash	$ 707,350	$ 1,290,797
Accounts receivable, net of allowance for doubtful accounts of $165,840 at March 31, 2019 and December 31, 2018	2,855,897	2,866,474
Inventory	1,040,059	762,165
Prepaid expenses and other current assets	586,430	291,837
TOTAL CURRENT ASSETS	5,189,736	5,211,273
LONG-TERM ASSETS
Property and equipment, net	75,652	86,656
Operating lease right-of-use assets	121,159	0
Contract and other long-term assets	507,695	528,401
Long-term accounts receivable - financed contracts	1,020,398	1,030,354
TOTAL LONG-TERM ASSETS	1,724,904	1,645,411
TOTAL ASSETS	6,914,640	6,856,684
CURRENT LIABILITIES
Accounts payable and accrued expenses	244,198	387,868
Payroll liabilities	141,904	34,388
Current portion of operating lease liabilities	54,834	0
Notes payable	0	2,221
Customer deposits	287,496	334,784
Income taxes payable	78,027	53,027
TOTAL CURRENT LIABILITIES	806,459	812,288
LONG-TERM LIABILITIES
Operating lease liabilities	67,433	0
Contract liabilities	1,707,650	1,690,660
Deferred tax liability	514,000	555,000
TOTAL LIABILITIES	3,095,542	3,057,948
STOCKHOLDERS' EQUITY
Common stock, $0.001 par value; 25,000,000 shares authorized: 4,656,734 shares issued; and 4,528,668 shares outstanding at March 31, 2019 and December 31, 2018	4,529	4,529
Additional paid-in capital	1,808,362	1,795,955
Retained earnings	2,202,733	2,194,778
TOTAL STOCKHOLDERS' EQUITY BEFORE TREASURY STOCK	4,015,624	3,995,262
Treasury stock, 128,065 shares (at cost) at March 31, 2019 and December 31, 2018	(196,526)	(196,526)
TOTAL STOCKHOLDERS' EQUITY	3,819,098	3,798,736
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 6,914,640	$ 6,856,684