Quarterly report pursuant to Section 13 or 15(d)

Cover
- Document and Entity Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- Organization and Summary of Significant Accounting Policies (Policies)
Notes Tables
Notes Details

Stockholders' Equity (Details)

v3.21.2

Stockholders' Equity (Details) - USD ($)	1 Months Ended				3 Months Ended				9 Months Ended
Stockholders' Equity (Details) - USD ($)	Aug. 31, 2021	Jan. 31, 2021	Sep. 30, 2020	Jan. 31, 2020	Sep. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Equity Offering
Common Stock shares, Outstanding					9,864,158				9,864,158		7,139,068
Finance costs attributable to issuance of warrants									$ 0	$ 211,000
Non-cash loss on changes in fair value of warrants					$ 0		$ 0		0	923,000
Stock-based compensation									1,359,000	$ 4,000
2015 Plan
Equity Offering
Number of additional shares authorized		1,000,000
Common Stock
Equity Offering
Issuance of common stock, net (in shares)						2,725,000	648,000	290,000
Common Stock \| Restricted stock agreement with Maxim Group, LLC
Equity Offering
Number of shares agreed to issue	50,000
Vesting period	12 months
Stock-based compensation					$ 9,000
January 2020 Offering
Equity Offering
Issuance of common stock, net (in shares)				290,000
Warrants to purchase shares of common stock				290,000
Exercise price of warrants (in dollars per share)				$ 7.50
Proceeds from sale of common stock				$ 1,900,000
Finance costs attributable to issuance of warrants									$ 200,000
Non-cash loss on changes in fair value of warrants				$ 900,000
September 2020 Offering
Equity Offering
Issuance of common stock, net (in shares)			648,000
Share issue price (in dollars per share)			$ 4.20				$ 4.20			$ 4.20
Proceeds from sale of common stock			$ 2,400,000
January 2021 Offering
Equity Offering
Issuance of common stock, net (in shares)		2,725,000
Warrants to purchase shares of common stock		2,725,000
Exercise price of warrants (in dollars per share)		$ 3.55
Proceeds from sale of common stock		$ 8,800,000

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