Balance at Beginning of

Period

Charged to

Profit and

Loss

Deduction

from

Reserves

Balance at

End of

Period

Year Ended December 31, 2020:

Allowance for doubtful accounts

$

801

430

(464

)

$

767

Valuation allowance for deferred income tax assets

6,126

240

(138

)

6,228

Year Ended December 31, 2019:

Allowance for doubtful accounts

$

660

$

312

$

(171

)

$

801

Valuation allowance for deferred income tax assets

9,433

345

(3,652

)

6,126

Year Ended December 31, 2018:

Allowance for doubtful accounts

$

477

$

449

$

(266

)

$

660

Valuation allowance for deferred income tax assets

10,413

1,785

(2,765

)

9,433