Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2016

Investments All Other Investments [Abstract]

Summary of Estimated Fair Values of Entity's Financial Instruments

The estimated fair values of the Company’s financial instruments are as follows:

			As at December 31, 2016				As at December 31, 2015
	Hierarchy Level		Carrying Amount		Fair Value		Carrying Amount		Fair Value
Cash and cash equivalents		1	$	106,553	$	106,553	$	93,431	$	93,431
Short-term investments		1		1,154		1,154		1,120		1,120
Loan receivable		2		1,766		1,766		1,497		1,497
Patent finance obligations		3		23,146		23,146		27,980		27,980

Information Regarding Aging and Collectability of Accounts Receivable

The following table provides information regarding the aging and collectability of the Company’s accounts receivable balances as at December 31, 2016:

Current	$	20,311
Past due 1 - 30 days		19
Past due 31 - 60 days		7
Past due 61 - 90 days		-
Over 91 days past due		158
Less allowance for doubtful accounts		(138	)
	$	20,357