Condensed Consolidated Statements of Cash Flows - USD ($)	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities:
Net income	$ 1,956,400	$ 409,900
Adjustment to reconcile net income to net cash provided (used) by operating activities:
Depreciation and amortization	388,500	75,100
Stock-based compensation	112,000	127,900
Deferred income taxes	576,700	265,600
Change in operating assets and liabilities:
Accounts receivables	(41,800)	(1,075,000)
Inventories	(794,600)	(948,200)
Prepaid expenses and other assets	(228,400)	92,100
Income taxes payable (receivable)	611,600	(22,400)
Accounts payable and accrued expenses	(799,800)	(16,000)
Total adjustments to net income	(175,800)	(1,500,900)
Net cash provided (used) by operating activities	1,780,600	(1,091,000)
Cash flows from investing activities:
Cash paid for Acquisition		(9,000,000)
Purchase of property and equipment	(124,700)	(175,700)
Net cash used by investing activities:	(124,700)	(9,175,700)
Cash flow from financing activities:
Borrowing under line-of-credit		3,694,200
Repayments under line-of-credit	(750,000)
Proceeds from issuance of long-term debt		2,400,000
Repayments of long-term debt	(400,000)
Debt issuance costs		(75,200)
Proceeds from exercise of stock options	34,800	27,200
Net cash (used) provided by financing activities:	(1,115,200)	6,046,200
Net increase (decrease) in cash and cash equivalents	540,700	(4,220,500)
Cash and cash equivalents, beginning of period	2,097,300	7,165,100
Cash and cash equivalents, end of period	2,638,000	2,944,600
Supplemental disclosures:
Cash paid during the period for interest	$ 75,100	$ 17,100