CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Cash flows related to operating activities:
Net income/(loss)	$ 100,000	$ 2,447,000
Adjustments to reconcile net income to cash generated (used) by operating activities:
Depreciation and amortization	1,442,000	1,268,000
(Loss)/Gain on disposal of property	(1,000)	137,000
Stock based compensation	339,000	316,000
(Decrease)/Increase in allowance for doubtful accounts	(149,000)	167,000
Increase/(Decrease) in inventory reserve	283,000	(106,000)
Decrease in warranty reserve	(38,000)	(8,000)
Deferred income taxes	(30,000)	188,000
Change in assets and liabilities:
Accounts receivable	5,696,000	(2,764,000)
Inventories	(3,538,000)	(4,895,000)
Prepaid income taxes	(67,000)	(102,000)
Other current assets	139,000	(26,000)
Other non-current assets		49,000
Accounts payable	(2,859,000)	1,964,000
Accrued employee compensation and benefit costs	(634,000)	375,000
Other accrued liabilities	(126,000)	177,000
Post retirement obligation	168,000	92,000
Employee stock ownership trust payment	101,000	101,000
Net cash generated (used) by operating activities	826,000	(620,000)
Cash flows related to investing activities:
Capital expenditures - property, plant and equipment	(729,000)	(2,271,000)
Net cash used by investing activities	(729,000)	(2,271,000)
Cash flows related to financing activities:
Principal payments on long-term debt	(547,000)	(548,000)
Principal payments on equipment financing lease obligations	(294,000)	(285,000)
Proceeds from equipment note and equipment financing lease		721,000
Proceeds from the line of credit	750,000	3,000,000
Purchase of treasury shares	(100,000)	(157,000)
Proceeds from paycheck protection program	4,000,000
Cash dividend		(409,000)
Net cash provided by financing activities	3,809,000	2,322,000
Net increase (decrease) in cash	3,906,000	(569,000)
Cash at beginning of year	2,029,000	2,598,000
Cash at end of year	$ 5,935,000	2,029,000
Supplemental Cash Flow Information:
Equipment acquired through financing paid directly to vendor		$ 333,000