Condensed Consolidated Balance Sheets (Unaudited) - USD ($)	Sep. 30, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents	$ 2,454,503	$ 3,522,620
Investment securities, available-for-sale, at fair value	1,084,761	1,050,220
Accounts receivable, net
Trade - billed (less allowance for doubtful accounts of $228,206 and $347,087)	10,767,243	7,187,630
Trade - unbilled	194,554	270,622
Inventories
Raw materials	940,718	642,467
Finished goods	2,056,601	1,936,350
Prepaid expenses and other assets	521,379	370,597
Refundable income taxes	154,720	251,115
Total current assets	18,174,479	15,231,621
Property and equipment, net	9,903,333	8,007,518
Other assets	144,514	173,086
Total assets	28,222,326	23,412,225
Current liabilities
Accounts payable - trade	2,552,369	2,139,760
Accrued expenses and other liabilities	472,230	293,641
Deferred revenue	1,345,857	724,442
Accrued compensation	1,014,355	882,749
Current maturities of notes payable	638,103	587,523
Customer deposits	1,482,026	431,480
Total current liabilities	7,504,940	5,059,595
Notes payable - less current maturities	3,043,839	3,345,511
Deferred tax liability	701,000	764,000
Total liabilities	11,249,779	9,169,106
Commitments and contingencies	0	0
Stockholders’ equity
Preferred stock, $.01 par value; authorized 1,000,000 shares, none issued and outstanding	0	0
Common stock, $.01 par value; authorized 8,000,000 shares; 5,216,148 and 5,085,348 issued and 5,013,228 and 4,941,428 outstanding, respectively	50,946	49,823
Additional paid-in capital	5,597,589	5,192,339
Treasury stock, at cost, 40,920 shares	(102,300)	(102,300)
Accumulated other comprehensive loss, net	(18,965)	(24,913)
Retained earnings	11,445,277	9,128,170
Total stockholders’ equity	16,972,547	14,243,119
Total liabilities and stockholders' equity	$ 28,222,326	$ 23,412,225