Condensed Consolidated Balance Sheets - USD ($)	Mar. 31, 2016	Dec. 31, 2015
Current assets
Cash and cash equivalents	$ 3,967,957	$ 7,814,220
Accounts receivable, net	641,575	678,646
Inventory, net	924,345	826,012
Prepaid expenses and other current assets	456,008	566,239
Total current assets	5,989,885	9,885,117
Property and equipment, net	996,564	1,074,710
Goodwill	600,814	637,528
Intangible assets, net	1,821,860	1,888,814
Other noncurrent assets	270,503	270,327
Total assets	9,679,626	13,756,496
Current liabilities
Accounts payable	2,205,538	2,285,792
Accrued compensation and benefits	1,260,839	1,081,270
Accrued liabilities	930,941	920,286
Deferred revenue	51,794	50,925
Current maturities of long-term capital lease obligation	242,459	251,800
Total current liabilities	4,691,571	4,590,073
Deferred rent	461,552	352,985
Long-term capital lease obligation and other noncurrent liabilities	277,190	328,642
Notes payable	994,792	993,750
Total liabilities	6,425,105	6,265,450
Stockholders' equity
Common stock, $.01 par value; 200,000,000 shares authorized; 12,576,306 and 12,547,644 shares issued and outstanding at March 31, 2016 and December 31, 2015, respectively	125,763	125,477
Preferred stock, $0.01 par value; 10,000,000 shares authorized; none issued at March 31, 2016 and December 31, 2015 (Note 8)	0	0
Additional paid-in capital	121,761,475	121,490,994
Accumulated other comprehensive loss	(2,171)	(1,059)
Accumulated deficit	(118,630,546)	(114,124,366)
Total stockholders’ equity	3,254,521	7,491,046
Total liabilities and stockholders’ equity	$ 9,679,626	$ 13,756,496