CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities
Net income	$ 4,222,755	$ 2,060,838
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation	276,924	236,535
Stock-based compensation	202,770	55,020
Bad debts reserve	14,526	63,111
Inventory reserve	13,656	(23,044)
(Gain) Loss on sale of property and equipment	(21,590)	457
(Increase) decrease in:
Accounts receivable	(5,097,249)	2,950,042
Inventory	1,151,008	(236,474)
Payments in advance	68,865	82,168
Prepaid expenses and other current assets	277,927	(1,938,074)
Income tax refunds receivable	0	2,964
Deposits	(16,411)	125
Increase (decrease) in:
Accounts payable and accrued expenses	(3,207,604)	(2,301,718)
Income taxes payable	1,407,703	137,197
Deferred compensation	20,000	20,000
Net cash provided by (used in) operating activities	(686,720)	1,109,147
Cash flows from investing activities
Capital expenditures	(260,912)	(34,272)
Proceeds from sale of property and equipment	35,848	0
Increase in short-term investments, net	(1)	(1)
Net cash used in investing activities	(225,065)	(34,273)
Cash flows from financing activities
Issuance of common stock	255,800	0
Repayment of note payable to bank	(14,394)	0
Repayment of short-term loan, net	(313,958)	(237,767)
Net cash used in financing activities	(72,552)	(237,767)
Effect of exchange rates on cash and cash equivalents	207,577	(18,225)
Net increase (decrease) in cash and cash equivalents	(776,760)	818,882
Cash and cash equivalents - beginning of period	5,022,436	2,967,042
Cash and cash equivalents - end of period	4,245,676	3,785,924
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid for interest	16,133	9,323
Cash paid for income taxes	354	550,000
Other noncash investing and financing activities
Common stock issued for services	$ 202,770	$ 55,020