Note 13 - Marketable Securities

12 Months Ended

Dec. 31, 2020

Notes to Financial Statements

Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]

	2020						2019
			Unrealized		Fair				Unrealized		Fair
	Cost		Gains (Losses)		Value		Cost		Gains (Losses)		Value
Certificates of deposit - Current marketable securities	$	21	$	—	$	21	$	19	$	—	$	19
Corporate securities - Noncurrent marketable securities	$	16	$	33	$	49	$	—	$	—	$	—

Certificates of deposit maturing in one year or less total $21 at  December 31, 2020.

We held $16 of convertible notes receivable from our investment in Hyliion Inc. On October 1, 2020, Hyliion completed its merger with Tortoise Acquisition Corp. The business combination resulted in the combined company being renamed Hyliion Holdings Corp., with its common stock being listed on the New York Stock Exchange under the ticker symbol HYLN. Effective with the completed merger, our notes receivable were converted into 2,988,229 common shares of HYLN. Our investment in Hyliion is included in noncurrent marketable securities and carried at fair value with changes in fair value included in net income in future periods. The strategic partnership with Hyliion establishes Dana as the preferred supplier for e-propulsion systems to Hyliion as long as Dana maintains a minimum equity investment in Hyliion.