Condensed Consolidated Balance Sheets - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents	$ 4,735,506	$ 1,847,171
Accounts receivable, net	315,612	809,540
Inventory, net	529,815	533,425
Prepaid expenses and other current assets	457,929	311,644
Total current assets	6,038,862	3,501,780
Property and equipment, net	1,150,238	835,537
Goodwill	600,814	600,814
Intangible assets, net	1,152,320	1,353,182
Other noncurrent assets	280,652	328,601
Total assets	9,222,886	6,619,914
Current liabilities
Accounts payable	1,036,005	1,691,712
Accrued compensation and benefits	1,023,577	746,924
Accrued liabilities	965,178	1,160,714
Deferred revenue	10,323	24,442
Short-term notes payable	470,911	1,010,961
Current maturities of long-term capital lease obligations	358,604	154,839
Total current liabilities	3,864,598	4,789,592
Deferred rent	196,558	290,719
Note payable	659,728
Warrant liability	383	8,453
Long-term capital lease obligations and other noncurrent liabilities	472,068	130,153
Total liabilities	5,193,335	5,218,917
Commitments (Note 9)
Stockholders' equity
Common stock, $0.01 par value; 50,000,000 shares authorized; 6,425,470 and 2,265,320 shares issued and outstanding at September 30, 2018 and December 31, 2017, respectively	64,255	22,653
Preferred stock, $0.01 par value; 10,000,000 shares authorized; none issued and outstanding at September 30, 2018 and December 31, 2017, respectively	0	0
Additional paid-in capital	162,330,283	150,114,671
Accumulated other comprehensive loss	(18,838)	(25,900)
Accumulated deficit	(158,346,149)	(148,710,427)
Total stockholders’ equity	4,029,551	1,400,997
Total liabilities and stockholders’ equity	$ 9,222,886	$ 6,619,914