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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 1
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For each plan, identification of the award pricing model or other valuation method used in calculating the weighted average fair values disclosed. The model is also used to calculate the compensation expense that is shown within the balance sheet, income statement, and cash flow. Examples of valuation techniques are lattice models (binomial model), closed-form models (Black-Scholes-Merton formula), and a Monte Carlo simulation technique. Fair value is the amount at which an asset or liability could be bought or incurred or sold or settled in a current transaction between willing parties, that is, other than in a forced or liquidation sale. May include disclosures about the assumptions underlying application of the method selected.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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Stock-Based Compensation (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		12 Months Ended
	Dec. 31, 2020	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 31, 2018	Jan. 30, 2017
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Other than options, granted		26,381
Equity Plan 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized for granting		750,000
Shares available to be granted		665,745
Award description		The Company may issue shares of common stock or grant other equity-based awards pursuant to the 2016 Equity Plan. Stock-based awards granted to date generally are time-based, vest in equal installments on each anniversary of the grant date and range over a one- to five-year period of time, and, in the case of stock options, expire 10 years from the grant date. As part of the 2016 Equity Plan, a performance equity incentive award program, known as the "Long-term incentive plan" allows participating officers of the Company to earn incentive awards of performance share/restricted stock units if certain pre-determined targets are achieved at the end of a three-year performance cycle. Stock-based compensation expense based on the grant date fair value is recognized ratably over the requisite service period for all awards and reflects forfeitures as they occur.
Other than options, granted, fair value		$ 133	$ 113
Equity Plan 2016 [Member] \| Stock Appreciation Rights (SARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award expiration		10 years
Equity Plan 2016 [Member] \| Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		3 years
Award description		Restricted stock units (RSUs) are similar to restricted stock, except the recipient does not receive the stock immediately, but instead receives it upon the terms and conditions of the Company's long-term incentive plans which are subject to performance milestones achieved at the end of a three-year period. Each RSU cliff vests at the end of the three-year period and entitles the recipient to receive one share of common stock on a specified issuance date. The recipient does not have any stockholder rights, including voting rights, with respect to the shares underlying awarded RSUs until the recipient becomes the holder of those shares.During 2018, the Company entered into a long-term incentive program agreement with officers of the Company and its subsidiaries to award RSUs based on a performance metric to be achieved as of December 31, 2020. Assuming the performance metric is achieved, these awards will cliff vest on this date, in which the final number of common shares to be issued will be determined. The range of RSUs which could potentially be awarded at the end of the performance cycle is between 13,188 shares and 52,769 shares, assuming a certain performance metric is met. The table below presents management's evaluation of the probable number of common stock awards to be issued at the end of the performance cycle.During 2017, the Company entered into a long-term incentive program agreement with officers of the Company and its subsidiaries to award RSUs based on a performance metric to be achieved as of December 31, 2019. Assuming the performance metric is achieved, these awards will cliff vest on this date, in which the final number of common shares to be issued will be determined. The range of RSUs which could potentially be awarded at the end of the performance cycle is between 12,703 shares and 50,830 shares, assuming a certain performance metric is met. The table below presents management's evaluation of the probable number of common stock awards to be issued at the end of the performance cycle.
Other than options, granted, fair value		$ 695	$ 0
Equity Plan 2016 [Member] \| Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award method used for valuation		Black-Scholes valuation model
Share price		$ 18.86					$ 17.92	$ 15.89
Options, Weighted average remaining contractual term		7 years 1 month 6 days
Options, granted, weighted average fair value		$ 10.99
Options, outstanding intrinsic value		$ 250
Options, exercised, intrinsic value		365				$ 8
Options, exercisable, intrinsic value		$ 250
Maximum [Member] \| Equity Plan 2016 [Member] \| Stock Appreciation Rights (SARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		5 years
Maximum [Member] \| Equity Plan 2016 [Member] \| Restricted Stock Units (RSUs) [Member] \| Scenario, Forecast [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Other than options, granted	52,769			50,830	48,871
Minimum [Member] \| Equity Plan 2016 [Member] \| Stock Appreciation Rights (SARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		1 year
Minimum [Member] \| Equity Plan 2016 [Member] \| Restricted Stock Units (RSUs) [Member] \| Scenario, Forecast [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Other than options, granted	13,188			12,703	12,214