Financial instruments: (Tables)

12 Months Ended

Dec. 31, 2012

Financial instruments:

Schedule of contractual maturities of financial obligations

	Carrying amount		Contractual cash flows		< 1 year		1-3 years		4-5 years		> 5 years
Accounts payable and accrued liabilities	$	48,509	$	48,509	$	48,509	$	—	$	—	$	—
Unsecured subordinated debentures (1)	36,185		40,929		2,302		38,627		—		—
Long-term payable (2)	9,836		10,021		10,021		—		—		—
Senior financing (3)	18,812		19,240		3,718		8,551		6,971		—
Senior revolving financing (4)	13,185		13,185		13,185		—		—		—
Other bank financing	1,171		1,176		392		300		342		142
Other long-term debt	1,533		1,533		836		661		36		—
Operating lease commitments	—		19,358		4,785		7,964		5,490		1,119
Royalty payments(5)	—		22,906		1,357		21,549		—		—
	$	129,231	$	176,857	$	85,105	$	77,652	$	12,839	$	1,261

(1) Includes interest at 9%.

(2) Includes interest at 3.72%.

(3) Includes interest at 2.0%, the rate in effect at December 31, 2012.

(4) Includes interest at 2.3%, the rate in effect at December 31, 2012.

(5) From fiscal 2011 to 2015, inclusive, the Company is obligated to pay annual royalties equal to the greater of $1,357 (CDN$1,350) or 0.33% of the Company’s gross annual revenue from all sources, provided that gross revenue exceeds CDN$13,500 in any aforementioned fiscal year, up to a maximum of $28,333 (CDN$28,189). The Company has assumed the minimum required payments.

Schedule of carrying amount of financial instruments subject to exposure to foreign currency risk in the consolidated balance sheet

	U.S. dollars
Cash and cash equivalents	$	169,369
Short-term investments	24,442
Accounts receivable	7,864
Accounts payable	3,673

	Euros
Cash and cash equivalents	€	387
Current portion of long-term debt	7,459