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Organization and Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2020

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of disaggregated net sales

		Three months ended March 31,
		2020 (Unaudited)				2019 (Unaudited)
DC power systems		$	2,713			$	7,605
Accessories			147				142
Total net sales		$	2,860			$	7,747

		Three months ended March 31,
		2020 (Unaudited)				2019 (Unaudited)
Telecom		$	2,717			$	7,313
Government/Military			4				372
Marine			1				62
Other (backup DC power to various industries)			138				—
Total net sales		$	2,860			$	7,747

Schedule of components of inventory

		March 31, 2020  (unaudited)				December 31, 2019
Raw materials		$	8,552			$	8,651
Finished goods			5,581				5,861
			14,133				14,512
Less: Inventory reserve			(600	)			(600	)
Total Inventories, net		$	13,533			$	13,912

Schedule of reconciliation of the product warranty liability

Changes in estimates for warranties		March 31, 2020 (unaudited)				December 31, 2019
Balance at beginning of the period		$	375			$	175
Payments			(120	)			(530	)
Provision for warranties			120				730
Balance at end of the period		$	375			$	375

Schedule of potentially dilutive shares were excluded from the shares used to calculate diluted earnings per share as their inclusion would be anti-dilutive

		March 31, 2020 (Unaudited)				March 31, 2019 (Unaudited)
Options			140,000				360,000
Warrants			115,000				115,000
Total			255,000				475,000

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Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor.

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