Segmented Information (Tables)

12 Months Ended

Apr. 30, 2020

Disclosure Of Operating Segments [Abstract]

Disclosure of Selected Financial Information by Geographical Segment

The Company operates in three reportable geographical and one operating segment.  Selected financial information by geographical segment is as follows:

	Mexico											Canada			USA			April 30, 2020
	Bernal			Cortez/Altiplano			Other		Total									Total
Revenue
Mined Ore	$	24,820		$	—		$	—	$	24,820		$	—		$	—		$	24,820
Cost of sales:
Mined Ore		(19,150	)		—			—		(19,150	)		—			—			(19,150	)
Depreciation		(3,686	)		—			—		(3,686	)		—			—			(3,686	)
Earnings from operations		1,984			—			—		1,984			—			—			1,984
Corporate costs and taxes		(3,022	)		(31	)		43		(3,010	)		(2,534	)		(30	)		(5,574	)
Sale of Altiplano		—			(39	)		—		(39	)		—			—			(39	)
Loss for the year		(1,038	)		(70	)		43		(1,065	)		(2,534	)		(30	)		(3,629	)
Mining interest, plant and equipment		35,268			—			—		35,268			34			—			35,302
Non-Current Assets		39,511			—			3,186		42,697			3,207			2,209			48,113
Total assets	$	44,829		$	48		$	3,392	$	48,269		$	3,930		$	2,214		$	54,413

	Mexico												Canada			USA			April 30, 2019
	Bernal			Cortez/Altiplano			Other			Total									Total
Revenue
Mined Ore	$	27,053		$	—		$	—		$	27,053		$	—		$	—		$	27,053
Purchase Concentrate		1,633			4,109			—			5,742			—			—			5,742
Cost of sales:
Mined Ore		(22,975	)		—			—			(22,975	)		—						(22,975	)
Purchase Concentrate		(1,550	)		(4,341	)		—			(5,891	)		—			—			(5,891	)
Depreciation		(3,775	)		(118	)		—			(3,893	)		—			—			(3,893	)
Earnings (loss) from operations		386			(350	)		—			36			—			—			36
Corporate costs and taxes		(2,999	)		(972	)		(161	)		(4,132	)		(2,357	)		(24	)		(6,513	)
Bad debt expense San Pedrito		(441	)		—			—			(441	)		—			—			(441	)
Write off Mining Interest		—			(4,804	)		—			(4,804	)		—			—			(4,804	)
Disposal of Exploration and Evaluation		—			—			—			—			—			(82	)		(82	)
Loss for the year		(3,054	)		(6,126	)		(161	)		(9,341	)		(2,357	)		(106	)		(11,804	)
Mining interest, plant and equipment		35,470			2,046			—			37,516			102			—			37,618
Total assets	$	44,956		$	2,228		$	3,517		$	50,701		$	4,219		$	2,085		$	57,005

				Mexico									Canada			USA			April 30, 2018
	Bernal			Altiplano			Other			Total									Total
Revenue
Mined Ore	$	21,005		$	—		$	—		$	21,005		$	—		$	—		$	21,005
Purchase Concentrate		3,976			2,826			—			6,802			—			—			6,802
Cost of sales:
Mined Ore		(20,532	)		—			(140	)		(20,672	)		—			—			(20,672	)
Purchase Concentrate		(3,654	)		(3,496	)		—			(7,150	)		—			—			(7,150	)
Depreciation		(4,492	)		(421	)		—			(4,913	)		—			—			(4,913	)
Earnings (loss) from operations		(3,697	)		(1,091	)		(140	)		(4,928	)		—			—			(4,928	)
Corporate costs and taxes		4,343			294			(409	)		4,228			(3,586	)		12			654
Write off Mining Interest		(6,713	)		—			—			(6,713	)		—			—			(6,713	)
Disposal of Exploration and Evaluation		(1,079	)		—			118			(961	)		—			(52	)		(1,013	)
Loss for the year		(7,145	)		(797	)		(432	)		(8,374	)		(3,586	)		(40	)		(12,000	)
Mining interest, plant and equipment		35,302			6,005			1			41,308			168			—			41,476
Total assets	$	48,614		$	8,095		$	3,930		$	60,639		$	3,537		$	2,150		$	66,326