Condensed Consolidated Balance Sheets (unaudited) - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 11,469,455	$ 2,708,223
Accounts receivable, net	165,931	567,811
Inventory, net	436,683	473,030
Note receivable	4,808,712	2,521,479
Prepaid expenses and other current assets	264,013	396,760
Total current assets	17,144,794	6,667,303
Property and equipment, net	102,579	130,759
Finance lease right-of-use assets, net	826,243	958,590
Operating lease right-of-use assets	885,882	1,043,537
Goodwill	600,814	600,814
Intangible assets, net		817,550
Other noncurrent assets	203,212	203,271
Total assets	19,763,524	10,421,824
Current liabilities
Accounts payable	1,054,261	1,056,035
Accrued compensation and benefits	988,291	855,994
Accrued liabilities	1,047,019	1,046,661
Deferred revenue	9,808	9,808
Short-term notes payable	348,494	373,599
Short-term finance lease liabilities	517,042	579,030
Short-term operating lease liabilities	947,610	1,017,414
Total current liabilities	4,912,525	4,938,541
Note payable	163,401	329,456
Long-term finance lease liabilities	212,798	313,263
Long-term operating lease liabilities	392,106	547,225
Total liabilities	5,680,830	6,128,485
Commitments (Note 9)
Stockholders' equity
Preferred stock, $0.01 par value; 10,000,000 shares authorized; none issued and outstanding at March 31, 2020 and December 31, 2019, respectively
Common stock, $0.01 par value; 50,000,000 shares authorized; 12,468,214 and 5,582,280 shares issued and outstanding at March 31, 2020 and December 31, 2019, respectively	124,682	55,823
Additional paid-in capital	192,410,127	178,779,814
Accumulated deficit	(178,474,277)	(174,524,983)
Accumulated other comprehensive income (loss)	22,162	(17,315)
Total stockholders' equity	14,082,694	4,293,339
Total liabilities and stockholders' equity	$ 19,763,524	$ 10,421,824