Condensed Consolidated Balance Sheets - USD ($)	Jun. 30, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 3,055,894	$ 4,572,487
Accounts receivable, net	772,914	373,858
Inventory, net	567,422	543,747
Prepaid expenses and other current assets	178,356	292,918
Total current assets	4,574,586	5,783,010
Property and equipment, net	197,502	1,221,827
Finance lease right-of-use assets, net	984,742	0
Operating lease right-of-use assets	1,381,830	0
Goodwill	600,814	600,814
Intangible assets, net	951,458	1,085,366
Other noncurrent assets	241,182	259,346
Total assets	8,932,114	8,950,363
Current liabilities
Accounts payable	1,258,908	1,623,751
Accrued compensation and benefits	1,190,500	1,041,573
Accrued liabilities	820,667	902,019
Deferred revenue	9,993	15,824
Short-term notes payable	343,330	398,595
Short-term finance lease liabilities	576,322	399,345
Short-term operating lease liabilities	958,992	0
Total current liabilities	5,158,712	4,381,107
Deferred rent	0	162,919
Note payable	494,897	660,340
Warrant liability	0	67
Long-term finance lease liabilities	379,825	437,189
Long-term operating lease liabilities	1,071,677	0
Total liabilities	7,105,111	5,641,622
Commitments (Note 9)
Stockholders' equity
Preferred stock, $0.01 par value; 10,000,000 shares authorized; none issued and outstanding at June 30, 2019 and December 31, 2018, respectively	0	0
Common stock, $0.01 par value; 50,000,000 shares authorized; 17,645,720 and 8,645,720 shares issued and outstanding at June 30, 2019 and December 31, 2018, respectively	176,457	86,457
Additional paid-in capital	170,190,415	165,313,902
Accumulated deficit	(168,524,652)	(162,078,525)
Accumulated other comprehensive loss	(15,217)	(13,093)
Total stockholders’ equity	1,827,003	3,308,741
Total liabilities and stockholders’ equity	$ 8,932,114	$ 8,950,363