The following table represents the changes in goodwill by operating segment for the six months ended June 30, 2022:


	June 30, 2022
	Diagnostics			Molecular Solutions
Balance as of January 1	$	3,604		$	36,675
Impairment		(3,604	)		—
Change related to foreign currency translation		—			(637	)
Balance as of June 30	$	—		$	36,038

We perform an annual goodwill impairment assessment as of July 31 each year by comparing the estimated fair values of our reporting units to their respective carrying values. A more frequent evaluation is performed if an event occurs or circumstances change between annual tests that could more likely than not reduce the fair value of a reporting unit below its carrying amount.

During the three months ended June 30, 2022, we determined that a triggering event occurred in relation to the depressed market price of the Company's common stock and corresponding significant decline in our market capitalization. As a result, we performed an interim goodwill impairment test and concluded that the carrying value of our Diagnostics reporting unit exceeded its estimated fair value and the goodwill balance for that segment was fully impaired. Thus, we recognized a pre-tax impairment charge of $3.6 million during the three months ended June 30, 2022, which is reported in loss on impairments in our condensed consolidated statement of operations.

We estimated fair values of both of our reporting units using a combined income-based approach and market-based approach. Our income approach utilized projected future cash flows that were discounted at a rate of 22% for the Diagnostic reporting unit and 20% for the Molecular Solutions reporting unit based on a weighted-average cost of capital analysis that reflected current market conditions. The market comparable approach primarily considered earnings, revenue and other multiples of comparable companies and applied those multiples to certain key drivers of the reporting units. This market approach utilized a revenue multiple weighted by year for the Diagnostics reporting unit and both a revenue and EBITDA multiple for the Molecular Solutions reporting unit. We assigned a weight of 75% to the results of our income-based approach and 25% to the results from the market-based approach for estimation of the reporting units' fair value. Our fair value estimates utilize significant unobservable inputs and thus represent Level 3 fair value measurements.