Note 1- Nature of Operations and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2019

Table Text Block Supplement [Abstract]

Schedule of Restricted Cash

The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the consolidated balance sheets that sum to the total of the same such amounts shown in the statements of cash flows.

	2019	2018
Cash and cash equivalents	$ 5,962	$ 8,365
Restricted cash	31	220
Total cash, cash equivalents, and restricted cash
shown in the statements of cash flows	$ 5,993	$ 8,585

Schedule of Doubtful Accounts

The table below represents changes in E&S’s allowance for doubtful accounts receivable for the years ended December 31:

	2019	2018
Beginning balance	$ 157	$ 109
Increase in estimated losses on accounts receivable	464	48
Ending balance	$ 621	$ 157

Schedule of Inventory

Inventories as of December 31, were as follows:

	2019	2018
Raw materials	$ 5,215	$ 5,979
Work in process	182	116
Finished goods	465	323
Reserve for obsolete inventory	(3,346)	(3,346)
Inventories, net	$ 2,516	$ 3,072

Schedule of Depreciation

Depreciation expense was $266 and $263 for the years ended December 31, 2019 and 2018, respectively. The cost and estimated useful lives of property and equipment and the total accumulated depreciation were as follows as of December 31:

	Estimated
	Useful Lives	2019	2018
Land	n/a	$ 2,250	$ 2,250
Buildings and improvements	5 - 40 years	3,065	3,065
Manufacturing machinery and equipment	3 - 8 years	4,685	4,554
Office furniture and equipment	3 - 8 years	630	630
Total		10,630	10,499
Less accumulated depreciation		(6,370)	(6,104)
Net property and equipment		$ 4,260	$ 4,395

Schedule of Product Warranty Reserve

The table below represents changes in E&S’s warranty reserve for the years ended December 31:

	2019	2018
Beginning balance	$ 171	$ 139
Additions to warranty reserve	139	166
Warranty costs	(139)	(134)
Ending balance	$ 171	$ 171

Schedule of Net Income Per Common Share

In periods resulting in a net loss, potential common shares are anti-dilutive and therefore are not included. Net income (loss) per common share has been computed based on the following:

	2019	2018
Numerator
Net Income (Loss)	$ (1,599)	$ 3,308
Denominator
Weighted-average number of common shares outstanding - basic	11,464	11,353
Incremental shares assumed for stock options	-	625
Weighted-average number of common shares outstanding - dilutive	11,464	11,978
Basic net income (loss) per common share	$ (0.14)	$ 0.29
Diluted net income (loss) per common share	$ (0.14)	$ 0.28