Goodwill — Goodwill represents the excess of the purchase price over the identifiable tangible and intangible assets acquired plus liabilities assumed arising from business combinations. The balance of goodwill was approximately $2.0 million and $2.4 million as of March 31, 2023 and December 31, 2022, respectively, as a result of the Company's acquisition of V-Go in May 2022. During the three months ended March 31, 2023, goodwill related to the acquisition of V-Go was adjusted for a reduction in rebate-related liabilities established at the time of acquisition. Goodwill is tested at least annually for impairment by assessing qualitative factors in determining whether it is more likely than not that the fair value of net assets is below their carrying amounts. See Note 1 – Description of Business and Significant Accounting Policies.

Other Intangible Asset — Other intangible asset consisted of the following (dollars in thousands):


	Estimated		March 31, 2023							December 31, 2022
	Useful Life (Years)		Cost		Accumulated Amortization			Net Book Value		Cost		Accumulated Amortization			Net Book Value
Developed technology		15	$	1,200	$	(67	)	$	1,133	$	1,200	$	(47	)	$	1,153

Amortization expense related to the other intangible asset was de minimis for the three months ended March 31, 2023.

The estimated annual amortization expense for the other intangible asset for the years ended December 31, 2023 through 2027 will be approximately $0.1 million per year and $0.7 million, thereafter.

The Company evaluates its other intangible asset for potential impairment when events or changes in circumstances indicate that the carrying amount of an asset or asset group may not be recoverable. See Note 1 – Description of Business and Significant Accounting Policies.