Condensed Balance Sheets (Unaudited) - USD ($)	Jun. 30, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 1,790,822	$ 125,982
Accounts receivable, net	3,551,817	2,760,606
Inventories	6,752,494	7,927,678
Deposits on inventory purchases	1,394,283	723,639
Prepaid expenses and other current assets	237,943	194,946
Total current assets	13,727,359	11,732,851
Other assets	235,893	222,160
Operating lease right-of-use assets, net	151,722	0
Equipment, net	287,320	261,476
Total assets	14,402,294	12,216,487
Current liabilities
Bank debt	0	1,741,272
Accounts payable	4,500,567	4,369,309
Operating lease liabilities	99,564	0
Accrued other expenses	2,529,664	2,229,561
Total current liabilities	7,129,795	8,340,142
Long-term operating lease liabilities	52,158	0
Total liabilities	7,181,953	8,340,142
Commitments and contingencies (Note 4)
Stockholders' equity
Common stock: authorized: 40,000,000 shares at $0.01 par value, issued and outstanding: 20,742,636 shares at June 30, 2019 and 16,124,681 shares at December 31, 2018	207,426	161,247
Additional paid-in capital	46,259,984	41,035,936
Accumulated deficit	(39,247,069)	(37,320,838)
Total stockholders' equity	7,220,341	3,876,345
Total liabilities and stockholders' equity	$ 14,402,294	$ 12,216,487