Financial instruments (Tables)

12 Months Ended

Dec. 31, 2020

Financial instruments

Schedule of Fair value hierarchy for assets and liabilities

The following table presents the Company’s fair value hierarchy for assets and liabilities measured at fair value as of December 31, 2020 and 2019:

	December 31, 2020
	Level 1		Level 2		Level 3		Total
Liabilities:
Recurring
Net liability arising from put/call options	$	—	$	—	$	690,000	$	690,000

	December 31, 2019
	Level 1		Level 2		Level 3		Total
Liabilities:
Recurring
Net liability arising from put/call options	$	—	$	—	$	664,000	$	664,000

Schedule of Net liability arising from put/call options

	December 31, 2019
	Level 1		Level 2		Level 3		Total
Liabilities:
Recurring
Net liability arising from put/call options	$	—	$	—	$	664,000	$	664,000

Schedule of Net asset arising from put/call options

The activity for the Level 3 asset for the year ended December 31, 2020:

Net liability arising from put/call options
Balance as of December 31, 2019	$	664,000
Unrealized loss		26,000
Balance as of December 31, 2020	$	690,000