Consolidated Balance Sheets - USD ($)		Dec. 31, 2014	Dec. 31, 2013
Current Assets:
Cash and cash equivalents		$ 11,704,361	$ 16,575,508
Short term investments held to maturity		11,159,765	10,868,961
Trade accounts receivable, net of allowance of $253,871 and $285,348, respectively		11,868,582	9,055,561
Inventories, net of allowance of $394,165 and $549,981, respectively		6,840,845	7,027,644
Costs in excess of billings		0	552,012
Prepaid expenses and other		1,552,411	603,960
Total current assets		43,125,964	44,683,646
Property and equipment, net		8,229,989	8,206,563
Other Assets:
Investment - equity method		332,429	283,011
Other intangible assets, net		19,347,954	23,512,394
Deposits and other		130,579	25,364
Goodwill, net		21,886,958	22,448,613
Total other assets		41,697,920	46,269,382
Total assets		93,053,873	99,159,591
Current Liabilities:
Accounts payable		3,833,749	4,146,262
Mortgage note payable, current portion		80,746	76,814
Leases payable, current		32,723	83,904
Accrued expenses		3,161,258	2,943,979
Billings in excess of costs		3,623,906	6,787,231
Unearned revenue		1,622,579	1,257,346
Total current liabilities		12,354,961	15,295,536
Long term leases payable		74,071	58,363
Derivative liability		599,698	427,818
Long term mortgage note payable, net of current portion of $80,746 and $76,814, respectively		3,523,496	3,604,242
Long term notes payable, related party		5,303,683	5,303,683
Deferred revenue		131,565	0
Deferred tax liabilities, net	[1]	5,096,063	5,911,892
Total long term liabilities	[1]	14,728,576	15,305,998
Total liabilities	[1]	$ 27,083,537	$ 30,601,534
Commitments and contingencies
Stockholders' Equity:
Common stock, par value $0.001; 325,000,000 shares authorized; 20,747,740 shares issued and outstanding at December 31, 2014 and 20,566,663 shares issued and outstanding at December 31, 2013		$ 20,748	$ 20,567
Additional paid-in capital		148,397,980	146,614,995
Accumulated deficit	[1]	(82,716,744)	(79,915,466)
Accumulated other comprehensive income (loss)		268,352	1,837,961
Total stockholders' equity	[1]	65,970,336	68,558,057
Total liabilities and stockholders' equity	[1]	$ 93,053,873	$ 99,159,591

[1] Prior-period amounts have been revised to reflect an immaterial adjustment of deferred tax temporary differences and stockholders' equity (see Summary of Significant Accounting Policies, Adjustment of Prior Period Balances and Note 15. Income Taxes).