Consolidated Statements of Cash Flows - USD ($)		12 Months Ended
		Dec. 31, 2019		Dec. 31, 2018		Dec. 31, 2017
Cash flows from operating activities:
Net income (loss)		$ (1,903,781)	[1]	$ 4,398,365	[2]	$ 2,478,444	[2]
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization		1,655,223		1,798,762	[2]	1,884,043	[2]
Operating lease asset amortization		3,481,931		0	[2]	0	[2]
Impairment of goodwill and long-lived assets		1,001,835		285,477	[2]	0	[2]
Loss on disposal of assets		8,795		1,321	[2]	3,139	[2]
Stock-based compensation		770,188		327,629	[2]	239,599	[2]
Deferred income taxes		(334,343)		257,249	[2]	638,056	[2]
Exchange (gain) loss		137,241		(406,832)	[2]	32,999	[2]
Changes in operating assets and liabilities:
Accounts receivable-trade		(22,703)		49,155	[2]	88,445	[2]
Inventory		9,329,998		1,034,430	[2]	(2,978,285)	[2]
Prepaid expenses		596,071		71,915	[2]	66,812	[2]
Other current assets		(96,492)		0	[2]	0	[2]
Accounts payable-trade		3,499,627		(148,340)	[2]	764,889	[2]
Accrued expenses and other liabilities		(2,718,611)		314,937	[2]	(2,266,301)	[2]
Income taxes, net		(1,219,596)		(795,609)	[2]	1,148,313	[2]
Other assets		(325,691)		583,281	[2]	365,622	[2]
Operating lease liability		(3,388,399)		0	[2]	0	[2]
Total adjustments		12,375,074		3,373,375	[2]	(12,669)	[2]
Net cash provided by operating activities		10,471,293		7,771,740	[2]	2,465,775	[2]
Cash flows from investing activities:
Purchase of property and equipment		(268,961)		(1,088,328)	[2]	(1,691,999)	[2]
Purchase of short-term investments		(18,094,775)		0	[2]	0	[2]
Proceeds from sales of short-term investments		9,095,000		0	[2]	0	[2]
Proceeds from sales of assets		112,589		27,939	[2]	35,963	[2]
Net cash used in investing activities		(9,156,147)		(1,060,389)	[2]	(1,656,036)	[2]
Cash flows from financing activities:
Proceeds from long-term debt		0		1,596,288	[2]	0	[2]
Payments on long-term debt		(8,968,018)		0	[2]	0	[2]
Payments on capital lease obligations		0		0	[2]	(72,686)	[2]
Repurchase of treasury stock		(735,199)		(1,653,266)	[2]	0	[2]
Proceeds from exercise of stock options		0		0	[2]	223,404	[2]
Net cash (used in) provided by financing activities		(9,703,217)		(56,978)	[2]	150,718	[2]
Effect of exchange rate changes on cash and cash equivalents		222,878		(666,879)	[2]	260,096	[2]
Net (decrease) increase in cash and cash equivalents		(8,165,193)		5,987,494	[2]	1,220,553	[2]
Cash and cash equivalents, beginning of period	[2]	24,070,351		18,082,857		16,862,304
Cash and cash equivalents, end of period		15,905,158		24,070,351	[2]	18,082,857	[2]
Supplemental disclosures of cash flow information:
Interest paid during the period		36,260		304,957	[2]	205,555	[2]
Income tax paid during the period, net of refunds		714,620		1,361,400	[2]	2,243,018	[2]
Supplemental disclosures of non-cash activity:
Cumulative effect of accounting changes - ASC 842	[3]	(361,816)		0	[2]	0	[2]
Operating lease assets obtained in exchange for lease liabilities, net		$ 17,328,019		$ 0	[2]	$ 0	[2]

[1] For the year ended December 31, 2019, there were 9,203 shares excluded from the diluted EPS calculation because the impact of their assumed vesting would be anti-dilutive due to a net loss in that period.

[2] As described in Note 2 to these Consolidated Financial Statements, we have restated the Consolidated Financial Statements.

[3] ASC 842 - Leases - "Topic 842"