Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash Flows From Operating Activities
Net income	$ 8,716	$ 7,426
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	182	201
Stock-based compensation	794	730
Accretion of premium on available-for-sale investments	(740)	(318)
Gain on disposal of fixed asset	(132)
Inventory valuation adjustment	50	218
Deferred income taxes	(511)	(597)
Noncash lease expense	364	303
Unrealized gain	(143)
Changes in operating assets and liabilities:
Accounts receivable	(138)	(83)
Inventory	(2,791)	345
Prepaid expenses and other current assets	(88)	(186)
Other assets	80	10
Accounts payable	(1)	(788)
Accrued liabilities	694	514
Customer deposits	(677)	101
Lease liabilities	(122)	(80)
Other liabilities	(184)	(236)
Net cash provided by operating activities	5,353	7,560
Cash Flows From Investing Activities
Purchase of property and equipment	(66)	(111)
Purchases of debt securities	(28,618)	(8,035)
Proceeds from maturities of debt securities	37,839	11,100
Net cash provided by investing activities	9,155	2,954
Cash Flows From Financing Activities
Payment of dividends	(4,603)	(4,555)
Net proceeds from exercise of stock options	72	39
Payment for shares withheld for tax withholdings on vesting of restricted stock units	(71)	(76)
Net cash used in financing activities	(4,602)	(4,592)
Net increase in cash and cash equivalents	9,906	5,922
Cash and cash equivalents at beginning of period	13,671	19,392
Cash and cash equivalents at end of period	23,577	25,314
Supplemental Disclosure of Cash Flow Information
Cash paid for income taxes	2,305	1,589
Supplemental Disclosure of Noncash Investing and Financing Information
Right-of-use assets obtained in exchange for lease liabilities	58	26
Property and equipment purchased but not yet paid		32
Vender credit received upon disposal of fixed asset	58
Cash dividend declared but not yet paid	$ 4,626	$ 4,583