EQUITY INCENTIVE PLAN (Summary of Stock Option Activity) (Details) - Stock Options [Member] - $ / shares	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Number of Options
Outstanding at beginning of period (in shares)	490,330
Granted (in shares)	433,550	292,604
Forfeited (in shares)	(100,888)	(27,169)
Outstanding at end of period (in shares)	822,992	490,330
Exercisable at end of period (in shares)	337,155
Weighted-Average Exercise Price
Outstanding at beginning of period (in dollars per share)	$ 8.30
Granted (in dollars per share)	2.01	$ 2.36
Forfeited (in dollars per share)	12.64	6.03
Outstanding at end of period (in dollars per share)	4.46	$ 8.30
Exercisable at end of period (in dollars per share)	$ 6.59

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-SubTopic 10
-Section 50
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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Gross number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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