Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities
Net income	$ 1,568,854	$ 329,148
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	459,815	381,011
Gain on disposal of fixed assets	(16,518)	(14,043)
Allowance for doubtful accounts	(149,814)	(30,801)
Stock compensation	220,314	0
Deferred taxes	29,000	341,000
(Increase) decrease in
Accounts receivable - billed	(1,914,604)	(1,151,726)
Accounts receivable - unbilled	32,250	(438,838)
Inventories	(864,803)	(208,485)
Prepaid expenses and other assets	(213,484)	(114,703)
Refundable income taxes	168,405	(158,370)
Accounts payable - trade	389,820	753,620
Accrued expenses and other liabilities	399,548	50,808
Deferred revenue	672,179	(15,382)
Accrued compensation	(300,979)	409,184
Customer deposits	790,042	(337,767)
Net cash provided by (used in) operating activities	1,270,025	(205,344)
Cash flows from investing activities:
Purchases of investment securities available-for-sale	(20,630)	(23,712)
Purchases of property and equipment	(2,159,492)	(1,260,659)
Proceeds from sale of fixed assets	21,870	14,043
Net cash used in investing activities	(2,158,252)	(1,270,328)
Cash flows from financing activities:
Proceeds from long-term borrowings	183,784	715,131
Repayments of long-term borrowings	(286,775)	(195,576)
Dividends paid on common stock	(49,414)	0
Proceeds from options exercised	116,778	0
Net cash (used in) provided by financing activities	(35,627)	519,555
Net decrease in cash and cash equivalents	(923,854)	(956,117)
Cash and cash equivalents
Beginning of period	3,522,620	1,735,621
End of period	$ 2,598,766	$ 779,504