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Revenue	9 Months Ended
	Sep. 30, 2025
Revenue from Contract with Customer [Abstract]
Revenue	4. Revenue We generate revenue primarily through the sales of our licensed products, Ameluz® and BF-RhodoLED® lamps. Traditional PDT treatments using a lamp are usually performed more frequently during the winter. As such our revenue is subject to some seasonality and has historically been higher during the first and fourth quarters than during the second and third quarters.

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- Definition

The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.

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