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INCOME TAXES (Tables)
12 Months Ended
Dec. 31, 2021
INCOME TAXES  
Schedule of components of the provision for income taxes

​

​

​

​

​

​

​

​

​

​

​

Years ended December 31, 

    

2021

    

2020

    

2019

(in thousands)

 

​

  

 

​

  

 

​

  

Current provision:

 

​

  

 

​

  

 

​

  

Federal

​

$

7,176

​

$

4,741

​

$

6,637

State

​

 

346

​

 

582

​

 

202

Deferred (benefit) provision:

​

 

​

​

 

  

​

 

  

Federal

​

 

(248)

​

 

(410)

​

 

(715)

State

​

 

108

​

 

99

​

 

95

Total income tax provision

​

$

7,382

​

$

5,012

​

$

6,219

Schedule of reconciliation between the federal statutory rate and effective tax rate

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​

​

​

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​

​

​

Years ended December 31, 

    

2021

    

2020

    

2019

 

Federal statutory rate

 

21.0

%  

21.0

%  

21.0

%  

State income taxes, net of federal benefit

 

0.9

 

1.4

 

1.0

 

Research and experimentation credit

 

(0.9)

 

(1.5)

 

(1.2)

 

Non-deductible expenses

​

(0.8)

​

0.1

​

(0.7)

​

Change in contingencies

 

0.4

 

0.1

 

(0.1)

 

Adjustments related to vesting of restricted stock

 

(1.0)

 

(1.5)

 

(1.5)

 

Other

 

0.7

 

0.9

 

(0.5)

 

Effective tax rate

 

20.3

%  

20.5

%  

18.0

%  

Schedule of components of deferred tax assets and liabilities

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​

​

December 31, 

    

2021

    

2020

(in thousands)

 

​

  

 

​

  

Deferred tax assets:

 

​

  

 

​

  

Warranty costs

​

$

1,021

​

$

1,107

Sales incentives and discounts

​

 

83

​

 

278

Stock-based compensation

​

 

780

​

 

717

Pension

​

 

3,196

​

 

2,365

State NOL’s

​

​

283

​

​

423

State credits

​

​

—

​

​

1,818

All others

​

 

506

​

 

635

Valuation allowance

​

 

—

​

 

(1,818)

Total deferred tax assets

​

 

5,869

​

 

5,525

Deferred tax liabilities:

​

 

  

​

 

  

Depreciation and amortization expense

​

 

(1,033)

​

 

(965)

Basis differences in joint venture

​

 

(444)

​

 

(485)

Net deferred tax assets

​

$

4,392

​

$

4,075

Schedule of unrecognized tax benefits

​

​

​

​

​

​

​

​

(in thousands)

    

2021

    

2020

Balance at January 1

​

$

401

​

$

358

Additions based on tax positions related to the current year

​

 

32

​

 

34

Additions for tax positions of prior years

​

 

106

​

 

9

Balance at December 31

​

$

539

​

$

401