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EMPLOYEE STOCK OPTIONS, RESTRICTED STOCK AWARD PLAN AND 401(k) - Status of Restricted Stock Grants (Details) - Restricted Stock - $ / shares	3 Months Ended	6 Months Ended	9 Months Ended		12 Months Ended
	Mar. 31, 2019	Jun. 30, 2019	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock, Outstanding at beginning of the year	878,360	878,360	878,360	330,900	878,360	330,900	0
Restricted stock, Granted	0	15,400	20,400	4,500	657,605	619,880	330,900
Restricted stock, Forfeited or rescinded	(4,400)	(4,120)	(5,940)	(4,000)	(6,940)	(7,800)	0
Restricted stock, Vested	0	(400)	(900)	0	(187,136)	(64,620)	0
Restricted stock, Outstanding at end of year	873,960	889,240	891,920	331,400	1,341,889	878,360	330,900
Weighted-Average Grant Date Fair Value, Outstanding at beginning of the year	$ 7.33	$ 7.33	$ 7.33	$ 13.44	$ 7.33	$ 13.44	$ 0
Weighted-Average Grant Date Fair Value, Granted	0	5.01	4.59	11.40	2.63	4.78	13.44
Weighted-Average Grant Date Fair Value, Forfeited or rescinded	7.53	7.13	6.88	13.44	4.23	13.44	0
Weighted-Average Grant Date Fair Value, Vested	$ 0	$ 13.32	$ 11.40	$ 0	7.79	13.44	0
Weighted-Average Grant Date Fair Value, Outstanding at end of year					$ 4.99	$ 7.33	$ 13.44

X

- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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- Definition

Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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