Balance at Beginning of Period

Charged to Profit and Loss

Deduction from Reserves

Balance at End of Period

Year Ended December 31, 2021:

Allowance for doubtful accounts

$

767

$

653

$

(917

)

$

503

Valuation allowance for deferred income tax assets

6,228

-

(329

)

5,899

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