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NET INCOME (LOSS) PER SHARE	3 Months Ended
	Mar. 31, 2021
NET INCOME (LOSS) PER SHARE
NET INCOME (LOSS) PER SHARE	12. NET INCOME (LOSS) PER SHARE ​ For each of the three months ended March 31, 2021 and 2020, the calculations of basic and diluted weighted average shares of common stock outstanding do not include 5,000 shares relating to stock options as the effects of those options were anti-dilutive. ​ ​

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The entire disclosure for earnings per share.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=109243012&loc=SL65017193-207537

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-URI http://asc.fasb.org/topic&trid=2144383

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
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