
(in thousands)	June 30, 2020		December 31, 2019
Accrued expenses and other current liabilities:
Payroll related including bonus	$	1,192	$	1,314
Contingent consideration	71		1,568
Accrued marketing fees and royalties	715		304
Refund liability	597		622
Accrued purchase price consideration for business acquisition	—		3,029
Current portion of long-term debt	177		178
Other	4,484		3,585
	$	7,236	$	10,600

Our product offerings include premium, patented, child-resistant packaging, closed-system vaporization solutions and custom-branded retail products. For these product offerings, we generally receive a deposit from the customer (generally 50% of the total order cost, but the amount can vary by customer contract), when an order is placed by a customer. We typically complete orders related to customer deposits within four weeks to three months from the date of order, depending on the complexity of the customization and the size of the order. Changes in our customer deposits liability balance during the six months ended June 30, 2020 were as follows:


(in thousands)	Customer Deposits
Balance as of December 31, 2019	$	3,152
Increases due to deposits received, net of other adjustments	5,750
Revenue recognized	(5,858)
Balance as of June 30, 2020	$	3,044


(in thousands)	Foreign Currency Translation		Unrealized Loss on Derivative Instrument		Total
Balance at December 31, 2019	$	(22)	$	(50)	$	(72)
Other comprehensive loss	(156)		(559)		(715)

Less: Other comprehensive loss attributable to non-controlling interest	122		425		547
Balance at June 30, 2020	$	(56)	$	(184)	$	(240)


(in thousands)	Foreign Currency Translation		Unrealized Loss on Derivative Instrument		Total
Balance at December 31, 2018	$	(286)	$	—	$	(286)
Other comprehensive income	51		—		51
Effects of the reorganization transactions	203		—		203
Less: Other comprehensive income attributable to non-controlling interest	(24)		—		(24)
Balance at June 30, 2019	$	(56)	$	—	$	(56)

We have three major vendors whose products accounted for an aggregate of approximately 31.4% and 33.5% of our total net sales and 42.7% and 41.4% of our total purchases for the three and six months ended June 30, 2020, respectively, and an aggregate of approximately 62.4% and 60.6% of our total net sales and 66.4% and 62.5% of our total purchases for the three and six months ended June 30, 2019, respectively. We expect to maintain our existing relationships with these vendors.