Condensed Consolidated Balance Sheets (Unaudited) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents	$ 1,006,000	$ 3,390,000
Investment securities, available-for-sale, at fair value	1,087,000	1,098,000
Accounts receivable, net
Trade - billed (less allowance for doubtful accounts of $279 and $208)	9,833,000	8,967,000
Trade - unbilled	550,000	251,000
Inventories
Raw materials	747,000	819,000
Finished goods	2,253,000	2,696,000
Prepaid expenses and other assets	528,000	452,000
Refundable income taxes	1,325,000	1,359,000
Total current assets	17,329,000	19,032,000
Property and equipment, net	10,481,000	9,867,000
Operating lease, net	1,076,000	0
Other assets	271,000	326,000
Total assets	29,157,000	29,225,000
Current liabilities
Accounts payable - trade	2,731,000	3,059,000
Accrued expenses and other liabilities	695,000	588,000
Deferred revenue	1,245,000	1,144,000
Accrued compensation	621,000	1,231,000
Dividend payable	0	256,000
Current maturities of notes payable	693,000	637,000
Customer deposits	749,000	919,000
Total current liabilities	6,734,000	7,834,000
Deferred buy-back lease	1,344,000	0
Notes payable - less current maturities	3,039,000	2,896,000
Deferred tax liability	1,148,000	1,290,000
Total liabilities	12,265,000	12,020,000
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; 5,220,648 and 5,214,148 issued and 5,075,395 and 5,047,895 outstanding, respectively	51,000	51,000
Additional paid-in capital	5,842,000	5,719,000
Treasury stock, at cost, 40,920 shares	(102,000)	(102,000)
Accumulated other comprehensive loss, net	(33,000)	(19,000)
Retained earnings	11,134,000	11,556,000
Total stockholders’ equity	16,892,000	17,205,000
Total liabilities and stockholders' equity	$ 29,157,000	$ 29,225,000