Financial instruments - fair values and risk management (Tables)

12 Months Ended

Dec. 31, 2021

Financial instruments-fair values and risk management

Schedule of information regarding the credit risk exposure of trade receivables and contract assets

As of December 31, 2021
									Past due by
	Total Gross				Past due 1 -		Past due 31‑ 90		more than 90
in EUR k	amount		Not past due		30 days		days		days
Middle East	13,968		3,999		1,013		2,056		6,900
Europe	11,486		10,771		351		259		105
Latin America	683		531		23		72		57
North America	3,787		2,562		79		203		943
Asia Pacific	130		115		9		6		(1)
Total	30,054		17,978		1,475		2,596		8,004
Expected credit loss rate	19	%	0.9	%	7.7	%	11.7	%	64.1	%
Expected credit loss	5,717		167		114		304		5,132

As of December 31, 2020
									Past due by
	Total Gross				Past due 1 -		Past due 31‑ 90		more than 90
in EUR k	amount		Not past due		30 days		days		days
Middle East	10,515		3,338		486		385		6,306
Europe	20,017		19,193		706		113		5
Latin America	387		313		24		13		37
North America	2,870		1,205		994		262		409
Asia Pacific	178		136		18		24		—
Total	33,967		24,185		2,228		797		6,757
Expected credit loss rate	14.0	%	1.6	%	3.1	%	7.7	%	63.0	%
Expected credit loss	4,768		382		70		61		4,255

Schedule of development of impairment losses relating to trade and other receivables

in EUR k	2021	2020
As of January 1	4,768	2,355
Provision for expected credit losses	956	3,879
Derecognition of trade receivables	(7)	(1,466)
As of December 31	5,717	4,768

Schedule of residual contractual terms of financial liabilities, including estimated interest payments

		Contractually agreed cash flows
						More
Dec 31, 2021	Carrying		Less than	2 to 12	1 to 5	than
in EUR k	amount	Total	2 months	months	years	5 years
Bank overdrafts	3,310	3,310	3,310	—	—	—
Secured bank loans	505	505	105	400	—	—
Lease liabilities	18,997	22,050	716	3,403	9,038	8,893
Trade payables	11,252	11,252	11,252	—	—	—
	34,064	37,117	15,383	3,803	9,038	8,893

		Contractually agreed cash flows
						More
Dec 31, 2020	Carrying		Less than	2 to 12	1 to 5	than
in EUR k	amount	Total	2 months	months	years	5 years
Bank overdrafts	1,538	1,538	1,538	—	—	—
Secured bank loans	968	997	5	584	408	—
Other bank loans	387	394	—	394	—	—
Lease liabilities	21,205	24,897	716	3,580	9,861	10,740
Trade payables	31,736	31,525	31,011	514	—	—
	55,834	59,351	33,270	5,072	10,269	10,740

Schedule of reconciliation of liabilities arising from financing activities

			Non-cash changes
				Changes in
in EUR k	Jan 1, 2021	Cash flows	Additions	maturity and FX	Dec 31, 2021
Non-current financial liabilities	18,078	(401)	865	(2,954)	15,588
Non-current portion of secured bank loans	401	(401)	—	—	—
Non-current lease liabilities	17,677	—	865	(2,954)	15,588
Current financial liabilities	6,020	(2,802)	1,438	2,567	7,223
Current portion of secured bank loans	567	(62)	—	—	505
Bank loans	387	—	—	(387)	—
Bank overdrafts	1,538	1,505	267	—	3,310
Current lease liabilities	3,528	(4,245)	1,171	2,954	3,408
Total	24,098	(3,203)	2,303	(387)	22,811

			Non-cash changes
				Changes in
in EUR k	Jan 1, 2020	Cash flows	Additions	maturity	Dec 31, 2020
Non-current financial liabilities	19,647	(1,993)	2,029	(1,605)	18,078
Non-current portion of secured bank loans	968	—	—	(567)	401
Municipal loans	610	(610)	—	—	—
Non-current lease liabilities	18,069	(1,383)	2,029	(1,038)	17,677
Current financial liabilities	7,323	(5,520)	2,663	1,554	6,020
Current portion of secured bank loans	802	(865)	63	567	567
Bank loans	—	438	—	(51)	387
Bank overdrafts	2,636	(1,208)	110	—	1,538
Municipal loans	250	(250)	—	—	—
Current lease liabilities	3,635	(3,635)	2,490	1,038	3,528
Total	26,970	(7,513)	4,692	(51)	24,098

Schedule of net foreign currency exposure

	Dec 31, 2021
in EUR k	USD	INR	AED
Trade receivables	2,604	8	—
Trade payables and other liabilities	(2,394)	(4)	—
Net exposure	210	4	—

	Dec 31, 2020
in EUR k	USD	INR	AED
Trade receivables	1,224	18	—
Trade payables and other liabilities	(3,631)	(55)	(17)
Net exposure	(2,407)	(37)	(17)